@charset "UTF-8";
/* ==========================================================================
   深川新能源 · 官方网站样式
   风格：深蓝科技风（Deep Blue Tech）
   作者：分身助手
   ========================================================================== */

/* ---------- 1. 设计令牌 ---------- */
:root {
  --navy-950: #04121F;
  --navy-900: #06192B;
  --navy-800: #0A2540;
  --navy-700: #0E3355;
  --navy-600: #14456F;

  --blue-600: #1456B8;
  --blue-500: #1B6FE0;
  --blue-400: #3D8BFF;
  --blue-100: #E4EFFD;

  --orange-500: #FF7A18;
  --orange-400: #FFA033;
  --orange-100: #FFF0E4;

  --green-500: #12B981;

  --ink: #0E1F2E;
  --text: #33475B;
  --muted: #6B7C93;
  --line: #E3EAF2;
  --bg-soft: #F4F8FC;
  --bg-soft-2: #EDF3FA;
  --white: #FFFFFF;

  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 22px;

  --shadow-sm: 0 2px 8px rgba(10, 37, 64, .06);
  --shadow: 0 10px 30px rgba(10, 37, 64, .09);
  --shadow-lg: 0 24px 60px rgba(10, 37, 64, .14);

  --container: 1200px;
  --header-h: 76px;
  --topbar-h: 38px;

  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
          "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --mono: "SF Mono", "JetBrains Mono", Consolas, "Courier New", monospace;
}

/* ---------- 2. 基础重置 ---------- */
*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background: var(--white);
  overflow-x: hidden;
}

h1, h2, h3, h4, h5 { margin: 0; color: var(--ink); font-weight: 700; line-height: 1.3; letter-spacing: -.01em; }
p { margin: 0; }
a { color: inherit; text-decoration: none; transition: color .2s; }
ul, ol { margin: 0; padding: 0; list-style: none; }
img, svg { display: block; max-width: 100%; }
button { font: inherit; cursor: pointer; border: 0; background: none; }

::selection { background: var(--blue-500); color: #fff; }

/* 滚动条 */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--bg-soft); }
::-webkit-scrollbar-thumb { background: #C3D3E4; border-radius: 6px; border: 2px solid var(--bg-soft); }
::-webkit-scrollbar-thumb:hover { background: var(--blue-400); }

/* ---------- 3. 布局工具 ---------- */
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.section { padding: 96px 0; }
.section--soft { background: var(--bg-soft); }
.section--dark { background: var(--navy-900); color: rgba(255,255,255,.78); }
.section--dark h2, .section--dark h3, .section--dark h4 { color: #fff; }
.flex { display: flex; }
.center { text-align: center; }

/* 防止子元素内容撑破栅格轨道（移动端横向溢出的根因防线） */
.hero-grid > *, .stats-grid > *, .biz-grid > *, .qual-grid > *, .adv-grid > *,
.proj-grid > *, .tile-grid > *, .flow > *, .split > *, .contact-grid > *,
.footer-top > *, .cert-grid > *, .visit-grid > *, .field-row > * { min-width: 0; }

/* ---------- 4. 标题组件 ---------- */
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 600; letter-spacing: .14em; text-transform: uppercase;
  color: var(--blue-500); margin-bottom: 16px;
}
.eyebrow::before {
  content: ""; width: 22px; height: 2px; border-radius: 2px;
  background: linear-gradient(90deg, var(--blue-500), var(--orange-500));
}
.section--dark .eyebrow { color: var(--blue-400); }

.sec-title { font-size: clamp(26px, 3.4vw, 40px); }
.sec-sub { margin-top: 16px; color: var(--muted); font-size: 16px; max-width: 640px; }
.sec-head { max-width: 760px; }
.sec-head.center { margin: 0 auto; text-align: center; }
.sec-head.center .sec-sub { margin-left: auto; margin-right: auto; }
.section--dark .sec-sub { color: rgba(255,255,255,.66); }

.grad-text {
  background: linear-gradient(96deg, var(--blue-400), #7FC0FF 55%, var(--orange-400));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}

/* ---------- 5. 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  height: 50px; padding: 0 28px; border-radius: 999px;
  font-size: 15px; font-weight: 600; white-space: nowrap;
  transition: transform .22s cubic-bezier(.2,.8,.3,1), box-shadow .22s, background .22s, color .22s, border-color .22s;
}
.btn svg { width: 17px; height: 17px; flex: none; }
.btn:hover { transform: translateY(-2px); }

.btn--primary {
  background: linear-gradient(120deg, var(--blue-500), var(--blue-600));
  color: #fff; box-shadow: 0 10px 26px rgba(27, 111, 224, .34);
}
.btn--primary:hover { box-shadow: 0 16px 34px rgba(27, 111, 224, .42); }

.btn--accent {
  background: linear-gradient(120deg, var(--orange-500), var(--orange-400));
  color: #fff; box-shadow: 0 10px 26px rgba(255, 122, 24, .32);
}
.btn--accent:hover { box-shadow: 0 16px 34px rgba(255, 122, 24, .42); }

.btn--ghost {
  border: 1px solid rgba(255,255,255,.32); color: #fff;
  background: rgba(255,255,255,.10);
}
.btn--ghost:hover { background: rgba(255,255,255,.14); border-color: rgba(255,255,255,.6); }

.btn--line { border: 1px solid var(--line); color: var(--navy-800); background: #fff; }
.btn--line:hover { border-color: var(--blue-400); color: var(--blue-500); box-shadow: var(--shadow-sm); }

.btn--sm { height: 42px; padding: 0 20px; font-size: 14px; }

/* 移动端菜单内的电话按钮：仅小屏显示 */
.nav-mobile-tel { display: none; }

/* ---------- 6. 顶部信息条 ---------- */
.topbar {
  background: var(--navy-950); color: rgba(255,255,255,.62);
  font-size: 13px; height: 38px; display: flex; align-items: center;
}
.topbar .container { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.topbar-left { display: flex; align-items: center; gap: 20px; min-width: 0; }
.topbar-item { display: inline-flex; align-items: center; gap: 7px; white-space: nowrap; }
.topbar-item svg { width: 14px; height: 14px; opacity: .75; }
.topbar-item a:hover { color: #fff; }
.topbar-right { display: flex; align-items: center; gap: 14px; white-space: nowrap; }
.topbar-right a:hover { color: #fff; }
.topbar .dot { width: 3px; height: 3px; border-radius: 50%; background: rgba(255,255,255,.3); }

/* ---------- 7. 导航 ---------- */
/* 注意：sticky 导航上不要用 backdrop-filter —— 它会逐帧重采样背景，
   是滚动卡顿的首要原因；用近似不透明底色即可。 */
.header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.97);
  border-bottom: 1px solid transparent;
  transition: box-shadow .28s, border-color .28s, background .28s;
}
.header.is-stuck { box-shadow: 0 6px 26px rgba(10,37,64,.09); border-bottom-color: var(--line); }
.header .container { display: flex; align-items: center; height: var(--header-h); gap: 20px; }

/* 首页透明导航 */
body.page-home .header:not(.is-stuck) {
  background: transparent; backdrop-filter: none;
  border-bottom-color: rgba(255,255,255,.12);
}
body.page-home .header:not(.is-stuck) .logo-name { color: #fff; }
body.page-home .header:not(.is-stuck) .logo-slogan { color: rgba(255,255,255,.55); }
body.page-home .header:not(.is-stuck) .nav-link { color: rgba(255,255,255,.82); }
body.page-home .header:not(.is-stuck) .nav-link:hover,
body.page-home .header:not(.is-stuck) .nav-link.is-active { color: #fff; }
body.page-home .header:not(.is-stuck) .nav-toggle span { background: #fff; }
body.page-home .header:not(.is-stuck) .header-tel { color: #fff; border-color: rgba(255,255,255,.28); }
body.page-home .header:not(.is-stuck) .header-tel:hover { background: rgba(255,255,255,.12); }
body.page-home .header:not(.is-stuck) .header-tel small { color: rgba(255,255,255,.6); }

.logo { display: flex; align-items: center; gap: 11px; flex: none; }
.logo-mark { width: 40px; height: 40px; flex: none; }
/* 官方横向 LOGO 图（2026-10 主人提供）：高 40px 等比缩放，宽随图。
   双版本切换：原色版用于白底页头；反白版用于首页透明导航（深色 hero）与页脚。 */
img.logo-mark--img { display: block; height: 42px; width: auto; object-fit: contain; }
img.logo-mark--white { display: none; }
body.page-home .header:not(.is-stuck) img.logo-mark--img { display: none; }
body.page-home .header:not(.is-stuck) img.logo-mark--white { display: block; }
.footer img.logo-mark--img { display: none; }
.footer img.logo-mark--white { display: block; }
.logo-text { display: flex; flex-direction: column; line-height: 1.15; }
.logo-name { font-size: 19px; font-weight: 800; color: var(--navy-800); letter-spacing: .05em; transition: color .28s; }
.logo-name .brand-s { color: #D8232A; transition: color .28s; }
.logo-slogan { font-size: 9.5px; letter-spacing: .06em; color: var(--muted); transition: color .28s; white-space: nowrap; }
body.page-home .header:not(.is-stuck) .logo-name .brand-s { color: #FF5560; }

.nav { margin-left: auto; display: flex; align-items: center; gap: 2px; min-width: 0; }
.nav-item { flex: none; }
.nav-link {
  position: relative; padding: 9px 13px; border-radius: 9px;
  font-size: 14.5px; font-weight: 500; color: var(--text); transition: color .2s, background .2s;
  white-space: nowrap;
}
.nav-link::after {
  content: ""; position: absolute; left: 13px; right: 13px; bottom: 3px; height: 2px;
  border-radius: 2px; background: var(--orange-500);
  transform: scaleX(0); transform-origin: left; transition: transform .26s cubic-bezier(.2,.8,.3,1);
}
.nav-link:hover { color: var(--blue-500); }
.nav-link.is-active { color: var(--blue-500); font-weight: 600; }
.nav-link.is-active::after { transform: scaleX(1); }
body.page-home .header:not(.is-stuck) .nav-link.is-active::after { background: var(--orange-400); }

.header-tel {
  display: inline-flex; align-items: center; gap: 8px; height: 42px; padding: 0 15px;
  border: 1px solid var(--line); border-radius: 999px; flex: none; white-space: nowrap;
  color: var(--navy-800); transition: all .22s;
}
.header-tel:hover { border-color: var(--blue-400); box-shadow: var(--shadow-sm); }
.header-tel svg { width: 16px; height: 16px; color: var(--blue-500); flex: none; }
.header-tel small { display: block; font-size: 10px; letter-spacing: .1em; color: var(--muted); line-height: 1.2; }
.header-tel b { display: block; font-size: 15px; font-weight: 700; letter-spacing: .01em; line-height: 1.25; }

.nav-toggle {
  display: none; width: 42px; height: 42px; border-radius: 10px;
  flex-direction: column; align-items: center; justify-content: center; gap: 5px;
  border: 1px solid var(--line); flex: none;
}
.nav-toggle span { display: block; width: 18px; height: 2px; border-radius: 2px; background: var(--navy-800); transition: transform .25s, opacity .2s; }
.nav-toggle.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(2) { opacity: 0; }
.nav-toggle.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- 8. Hero ---------- */
.hero {
  position: relative; margin-top: calc(var(--header-h) * -1);
  padding: calc(var(--header-h) + 76px) 0 96px;
  background: radial-gradient(1200px 620px at 78% 8%, #14456F 0%, transparent 62%),
              radial-gradient(900px 520px at 8% 92%, #0D3A63 0%, transparent 58%),
              linear-gradient(158deg, var(--navy-950) 0%, var(--navy-800) 52%, #0B2E4E 100%);
  color: #fff; overflow: hidden; isolation: isolate;
}
.hero::before {
  content: ""; position: absolute; inset: 0; z-index: -1; opacity: .5;
  background-image: linear-gradient(rgba(255,255,255,.045) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255,255,255,.045) 1px, transparent 1px);
  background-size: 62px 62px;
  mask-image: radial-gradient(900px 520px at 72% 30%, #000 0%, transparent 76%);
  -webkit-mask-image: radial-gradient(900px 520px at 72% 30%, #000 0%, transparent 76%);
}
/* 高光用多段径向渐变模拟柔光，不用 filter: blur（blur 会强制离屏合成） */
.hero::after {
  content: ""; position: absolute; z-index: -1;
  width: 720px; height: 720px; right: -190px; top: -250px; border-radius: 50%;
  background: radial-gradient(circle,
    rgba(61,139,255,.26) 0%,
    rgba(61,139,255,.16) 34%,
    rgba(61,139,255,.06) 56%,
    transparent 70%);
}
.hero-grid { display: grid; grid-template-columns: 1.06fr .94fr; gap: 56px; align-items: center; }

.hero-badge {
  display: inline-flex; align-items: center; flex-wrap: wrap; gap: 8px 10px; margin-bottom: 26px;
  padding: 7px 16px 7px 8px; border-radius: 999px; max-width: 100%;
  background: rgba(255,255,255,.09); border: 1px solid rgba(255,255,255,.15);
  font-size: 13.5px; color: rgba(255,255,255,.86);
}
.hero-badge i {
  display: inline-flex; align-items: center; gap: 5px; padding: 3px 11px; border-radius: 999px;
  background: linear-gradient(120deg, var(--orange-500), var(--orange-400));
  font-style: normal; font-size: 12px; font-weight: 700; letter-spacing: .04em; color: #fff;
}
.hero h1 { font-size: clamp(34px, 5.1vw, 60px); line-height: 1.16; color: #fff; letter-spacing: -.02em; }
.hero h1 em { font-style: normal; }
.hero-desc { margin-top: 24px; font-size: 17px; line-height: 1.85; color: rgba(255,255,255,.72); max-width: 560px; }
/* 文案里的重点词高亮（原为内联 style，改为后台可编辑后统一由 CSS 控制） */
.hero-desc strong { color: #fff; font-weight: 600; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 38px; }

.hero-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 40px; }
.hero-tag {
  display: inline-flex; align-items: center; gap: 7px; padding: 8px 15px; border-radius: 9px;
  background: rgba(255,255,255,.055); border: 1px solid rgba(255,255,255,.12);
  font-size: 13.5px; color: rgba(255,255,255,.78); max-width: 100%;
}
.hero-tag svg { width: 15px; height: 15px; color: var(--orange-400); flex: none; }

/* Hero 视觉 */
/* Hero 视觉：原 60px 大半径 drop-shadow 会让整块 SVG 离屏重绘，改为轻量阴影 */
.hero-visual { position: relative; min-width: 0; }
.hero-visual svg { width: 100%; max-width: 100%; height: auto; filter: drop-shadow(0 14px 26px rgba(0,0,0,.30)); }
/* 电网输电线路（2026-10-11 取代原「源网荷储一体化 / 电力施工资质」两张浮动资质卡）
   三基铁塔 + 三相导线 + 沿线的电流流动。铁塔画在风机/光伏之前（更早出栈），
   因此导线从塔身与储能柜、组件后方穿过，读作背景中的电网通道。 */
.sc-grid { opacity: .95; }
.sc-wire { stroke: #8FC2F0; stroke-width: 1.25; opacity: .32; }
.sc-flownet {
  stroke: #A6E6FF; stroke-width: 1.6;
  stroke-dasharray: 4 10; opacity: .92;
  animation: sc-dash 1.5s linear infinite;
}
.sc-griddots circle { fill: #CFEBFF; }

/* 场景舞台：SVG 与浮动卡共用定位上下文，使下方模式条增高时不会顶动浮动卡 */
.hero-stage { position: relative; }

/* 多场景搭配模式小方框：读作"这台设备还能怎么配" */
.mode-strip { margin-top: 20px; }
.mode-strip-label {
  display: inline-flex; align-items: center; gap: 9px;
  font-size: 12px; font-weight: 600; letter-spacing: .18em;
  color: rgba(190, 216, 245, .6);
}
.mode-strip-label::before {
  content: ""; width: 18px; height: 1px; background: currentColor; opacity: .65;
}
.mode-chips {
  display: flex; flex-wrap: wrap; gap: 8px; margin-top: 13px;
}
.mode-chip {
  display: flex; align-items: center; gap: 8px; min-height: 44px;
  padding: 9px 12px; border-radius: 11px;
  background: rgba(255, 255, 255, .055);
  border: 1px solid rgba(127, 192, 255, .22);
  font-size: 13px; font-weight: 600; line-height: 1.35;
  color: rgba(232, 243, 255, .9);
  transition: background .22s, border-color .22s, translate .22s, box-shadow .22s;
}
.mode-chip::before {
  content: ""; flex: none; width: 6px; height: 6px; border-radius: 2px;
  background: linear-gradient(135deg, var(--orange-400), var(--orange-500));
  box-shadow: 0 0 8px rgba(255, 122, 24, .5);
}
@media (hover: hover) {
  .mode-chip:hover {
    background: rgba(61, 139, 255, .14);
    border-color: rgba(127, 192, 255, .42);
    translate: 0 -1px;
  }
}

/* ---------- 8.5 Hero 场景动画 & 标签卡片升级 ----------
   风机叶片旋转（SMIL，见 index.html #hzTurbine）、电流流动线、
   光伏脉冲、太阳呼吸；hero-tags / mode-chips 升级为渐变卡片 +
   若隐若现呼吸 + hover 文字注释。 */
.sc-flow {
  stroke-dasharray: 5 9;
  opacity: .85;
  animation: sc-dash 1.4s linear infinite;
}
.sc-flow.f2 { animation-duration: 1.8s; }
.sc-flow.f3 { animation-duration: 1.6s; }
@keyframes sc-dash { to { stroke-dashoffset: -56; } }

.sc-pvpulse { opacity: 0; animation: sc-pvpulse 4.5s ease-in-out infinite; }
@keyframes sc-pvpulse { 0%, 100% { opacity: 0; } 45% { opacity: .26; } 62% { opacity: .08; } }

.sc-sun { animation: sc-sun 6s ease-in-out infinite; }
@keyframes sc-sun { 0%, 100% { opacity: .28; } 50% { opacity: .14; } }

.sc-stars circle { animation: sc-twinkle 3.6s ease-in-out infinite; }
.sc-stars circle:nth-child(2n) { animation-delay: .9s; }
.sc-stars circle:nth-child(3n) { animation-delay: 1.7s; animation-duration: 4.4s; }
@keyframes sc-twinkle { 0%, 100% { opacity: .12; } 50% { opacity: .8; } }

/* 浮动资质卡已于 2026-10-11 移除，改为 SVG 内的电网输电线路（见 .sc-grid） */

/* hero 业务标签：2×2 等宽网格（2026-10-08 重新排版：错落浮动去掉，位置稳定） */
.hero-tags {
  display: grid; grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px; margin-top: 40px;
}
.hero-tag {
  position: relative; align-items: center; gap: 10px;
  padding: 8px 14px 8px 12px; border-radius: 12px;
  background: linear-gradient(150deg, rgba(16, 48, 82, .92), rgba(9, 30, 51, .86));
  border: 1px solid rgba(96, 178, 255, .30);
  box-shadow: inset 0 1px 0 rgba(160, 215, 255, .16), inset 0 0 16px rgba(56, 132, 255, .07), 0 6px 16px rgba(2, 16, 34, .38);
  cursor: default;
  transition: translate .22s, border-color .22s, box-shadow .22s;
  animation: sc-breathe 6.5s ease-in-out infinite;
}
.hero-tag svg { width: 19px; height: 19px; }
/* 呼吸相位/节奏错开（只明暗呼吸，不位移） */
.hero-tag:nth-child(4n+1) { animation-delay: .8s;  animation-duration: 6.4s; }
.hero-tag:nth-child(4n+2) { animation-delay: 1.9s; animation-duration: 7.3s; }
.hero-tag:nth-child(4n+3) { animation-delay: .2s;  animation-duration: 6.8s; }
.hero-tag:nth-child(4n+4) { animation-delay: 2.6s; animation-duration: 7.1s; }
.tag-txt { display: flex; flex-direction: column; gap: 2px; line-height: 1.18; }
.tag-txt i {
  font-style: normal; font-size: 10.5px; letter-spacing: .06em;
  color: rgba(190, 216, 245, .62); white-space: nowrap;
}
.tag-txt b { font-size: 13.5px; font-weight: 700; color: #fff; white-space: nowrap; }
@keyframes sc-breathe {
  0%, 100% { opacity: .74; border-color: rgba(96, 178, 255, .18); }
  50% { opacity: 1; border-color: rgba(96, 178, 255, .44); }
}

/* 搭配模式小方框：同款深蓝发光；等高整齐流式（重新排版：不位移，只明暗呼吸） */
.mode-chip {
  min-height: 40px;
  background: linear-gradient(150deg, rgba(16, 48, 82, .92), rgba(9, 30, 51, .86));
  border-color: rgba(96, 178, 255, .30);
  box-shadow: inset 0 1px 0 rgba(160, 215, 255, .16), inset 0 0 16px rgba(56, 132, 255, .07), 0 6px 16px rgba(2, 16, 34, .38);
  animation: sc-breathe 6.5s ease-in-out infinite;
}
.mode-chip:nth-child(11n+1)  { animation-delay: .2s;  animation-duration: 6.2s; }
.mode-chip:nth-child(11n+2)  { animation-delay: .9s;  animation-duration: 7.1s; }
.mode-chip:nth-child(11n+3)  { animation-delay: 1.6s; animation-duration: 6.6s; }
.mode-chip:nth-child(11n+4)  { animation-delay: 2.3s; animation-duration: 7.4s; }
.mode-chip:nth-child(11n+5)  { animation-delay: 3.0s; animation-duration: 6.3s; }
.mode-chip:nth-child(11n+6)  { animation-delay: 3.7s; animation-duration: 7.2s; }
.mode-chip:nth-child(11n+7)  { animation-delay: 4.4s; animation-duration: 6.8s; }
.mode-chip:nth-child(11n+8)  { animation-delay: .6s;  animation-duration: 7.5s; }
.mode-chip:nth-child(11n+9)  { animation-delay: 1.3s; animation-duration: 6.1s; }
.mode-chip:nth-child(11n+10) { animation-delay: 2.0s; animation-duration: 7.3s; }
.mode-chip:nth-child(11n+11) { animation-delay: 2.7s; animation-duration: 6.5s; }

/* hover 文字注释（仅指针设备弹出；向上弹避免贴边裁切） */
.hero-tag::after, .mode-chip::after {
  content: attr(data-tip);
  position: absolute; bottom: calc(100% + 10px); left: 50%;
  transform: translateX(-50%) translateY(4px);
  width: max-content; max-width: 235px;
  padding: 9px 12px; border-radius: 10px;
  background: rgba(7, 24, 42, .96);
  border: 1px solid rgba(127, 192, 255, .32);
  box-shadow: 0 12px 28px rgba(0, 0, 0, .42);
  font-size: 12px; font-weight: 400; line-height: 1.7; letter-spacing: .02em;
  color: rgba(232, 243, 255, .94); text-align: left; white-space: normal;
  opacity: 0; pointer-events: none;
  transition: opacity .22s ease, transform .22s ease;
  z-index: 40;
}
.hero-tag::before, .mode-chip::before {
  content: ""; position: absolute; bottom: calc(100% + 4px); left: 50%;
  transform: translateX(-50%);
  border: 6px solid transparent; border-top-color: rgba(7, 24, 42, .96);
  opacity: 0; pointer-events: none;
  transition: opacity .22s ease;
  z-index: 40;
}
@media (hover: hover) {
  .hero-tag:hover, .mode-chip:hover {
    animation: none;            /* 解除呼吸后 translate 才可控（动画层会覆盖静态值） */
    opacity: 1;
    translate: 0 -3px;
    border-color: rgba(127, 192, 255, .55);
    box-shadow: inset 0 1px 0 rgba(180, 225, 255, .22), inset 0 0 20px rgba(66, 148, 255, .10), 0 10px 22px rgba(2, 16, 34, .46);
  }
  .hero-tag:hover::after, .mode-chip:hover::after {
    opacity: 1; transform: translateX(-50%) translateY(0);
  }
  .hero-tag:hover::before, .mode-chip:hover::before { opacity: 1; }
}

/* 减少动态偏好：场景与呼吸动画全部停用，内容静态呈现 */
@media (prefers-reduced-motion: reduce) {
  .sc-flow, .sc-pvpulse, .sc-sun, .sc-stars circle,
  .sc-flownet, .hero-tag, .mode-chip { animation: none !important; }
}

/* ---------- 8.6 卡片悬停详细介绍浮层（JS 单例，见 main.js 模块 11） ----------
   biz/adv/scene-card 有 overflow:hidden（装饰圆裁切），CSS 内嵌 ::after 会被裁掉，
   故弹层挂在 body 上（.js-tip），由 JS 定位到卡片上方；数据源为卡片 data-tip 属性
   （content.js 的 data-f-tip 从 content.json 卡片 tip 字段写入）。 */
.js-tip {
  position: fixed; z-index: 300; left: 0; top: 0;
  max-width: 340px; padding: 12px 15px; border-radius: 11px;
  background: rgba(7, 24, 42, .97);
  border: 1px solid rgba(127, 192, 255, .35);
  box-shadow: 0 14px 34px rgba(0, 0, 0, .45);
  font-size: 12.5px; line-height: 1.8; letter-spacing: .02em;
  color: rgba(235, 244, 255, .95); text-align: left;
  opacity: 0; pointer-events: none;
  transform: translateY(6px);
  transition: opacity .22s ease, transform .22s ease;
}
.js-tip.is-show { opacity: 1; transform: translateY(0); }
.js-tip::before {
  content: ""; position: absolute; left: var(--arrow-x, 50%); bottom: -5px;
  width: 10px; height: 10px; transform: translateX(-50%) rotate(45deg);
  background: rgba(7, 24, 42, .97);
  border-right: 1px solid rgba(127, 192, 255, .35);
  border-bottom: 1px solid rgba(127, 192, 255, .35);
}
.js-tip.is-below::before { bottom: auto; top: -5px;
  border: none; border-left: 1px solid rgba(127, 192, 255, .35);
  border-top: 1px solid rgba(127, 192, 255, .35); }

/* ---------- 9. 数据条 ---------- */
.stats { background: var(--navy-800); position: relative; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.stat {
  padding: 40px 26px; text-align: center; position: relative;
  border-right: 1px solid rgba(255,255,255,.09);
}
.stat:last-child { border-right: 0; }
.stat-num {
  font-size: clamp(30px, 3.6vw, 44px); font-weight: 800; line-height: 1.1; color: #fff;
  font-family: var(--mono); letter-spacing: -.02em;
}
.stat-num .u { font-size: 16px; font-weight: 600; color: var(--blue-400); margin-left: 4px; font-family: var(--font); }
.stat-label { margin-top: 10px; font-size: 14px; color: rgba(255,255,255,.6); }

/* ---------- 10. 业务卡片 ---------- */
/* 可点击跳转的卡片（首页八大业务 + 解决方案应用场景 → business.html#锚点；
   服务承诺那组 scene-grid 不在其中，见 main.js 模块 12） */
[data-list="business.cards"] .biz-card,
[data-list="sol.scene.cards"] .scene-card { cursor: pointer; }
.biz-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; margin-top: 54px; }
.biz-card {
  position: relative; padding: 38px 34px; border-radius: var(--radius-lg);
  background: #fff; border: 1px solid var(--line); overflow: hidden;
  transition: transform .3s cubic-bezier(.2,.8,.3,1), box-shadow .3s, border-color .3s;
}
.biz-card::after {
  content: ""; position: absolute; left: 0; top: 0; width: 100%; height: 3px;
  background: linear-gradient(90deg, var(--blue-500), var(--orange-500));
  transform: scaleX(0); transform-origin: left; transition: transform .34s cubic-bezier(.2,.8,.3,1);
}
.biz-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }
.biz-card:hover::after { transform: scaleX(1); }
.biz-icon {
  width: 60px; height: 60px; border-radius: 16px; display: grid; place-items: center;
  background: linear-gradient(140deg, var(--blue-100), #F5F9FF);
  border: 1px solid #D8E8FA; color: var(--blue-500); margin-bottom: 22px;
  transition: background .3s, color .3s, border-color .3s;
}
.biz-icon svg { width: 30px; height: 30px; }
.biz-card:hover .biz-icon {
  background: linear-gradient(140deg, var(--blue-500), var(--blue-600));
  border-color: transparent; color: #fff;
}
.biz-card h3 { font-size: 20px; margin-bottom: 12px; }
.biz-card p { font-size: 15px; color: var(--muted); }
.biz-list { margin-top: 20px; display: flex; flex-wrap: wrap; gap: 8px; }
.biz-list li {
  padding: 5px 12px; border-radius: 7px; background: var(--bg-soft);
  font-size: 13px; color: var(--navy-700); border: 1px solid #E7EFF8;
}

/* ---------- 11. 资质卡片 ---------- */
.qual-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; margin-top: 54px; }
/* 条目数为奇数时，最后一张卡片通栏，避免右半边留空（5 项场景） */
.qual-grid > :last-child:nth-child(odd) { grid-column: 1 / -1; }
.qual-card {
  display: flex; gap: 24px; padding: 34px; border-radius: var(--radius-lg);
  background: linear-gradient(150deg, #fff, #F7FBFF);
  border: 1px solid var(--line); box-shadow: var(--shadow-sm);
  transition: transform .3s cubic-bezier(.2,.8,.3,1), box-shadow .3s;
}
.qual-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); }
.qual-badge {
  flex: none; width: 76px; height: 76px; border-radius: 20px; display: grid; place-items: center;
  background: linear-gradient(150deg, var(--navy-800), var(--navy-600));
  color: #fff; box-shadow: 0 10px 24px rgba(10,37,64,.24);
}
.qual-badge svg { width: 36px; height: 36px; }
.qual-card h3 { font-size: 19px; margin-bottom: 8px; }
.qual-card .lv { display: inline-block; margin-left: 8px; padding: 2px 10px; border-radius: 6px; background: var(--orange-100); color: #C2570A; font-size: 12.5px; font-weight: 700; vertical-align: middle; }
.qual-card p { font-size: 14.5px; color: var(--muted); }
.qual-card .meta { margin-top: 14px; display: flex; flex-wrap: wrap; gap: 10px 22px; font-size: 13.5px; color: var(--navy-700); }
.qual-card .meta span { display: inline-flex; align-items: center; gap: 6px; }
.qual-card .meta svg { width: 14px; height: 14px; color: var(--blue-500); }
.qual-card .meta span b { color: var(--navy-800); font-weight: 700; margin-left: 2px; }

/* ---------- 12. 服务流程 ---------- */
.flow { margin-top: 58px; display: grid; grid-template-columns: repeat(6, 1fr); gap: 0; position: relative; }
.flow-step { position: relative; padding: 0 10px; text-align: center; }
.flow-dot {
  width: 54px; height: 54px; margin: 0 auto 20px; border-radius: 50%;
  display: grid; place-items: center; position: relative; z-index: 2;
  background: #fff; border: 2px solid var(--blue-400); color: var(--blue-500);
  font-weight: 800; font-size: 17px; font-family: var(--mono);
  box-shadow: 0 0 0 6px rgba(61,139,255,.10);
  transition: background .3s, color .3s, box-shadow .3s, transform .3s;
}
.flow-step:hover .flow-dot {
  background: linear-gradient(140deg, var(--blue-500), var(--blue-600));
  color: #fff; border-color: transparent; transform: scale(1.08);
  box-shadow: 0 0 0 8px rgba(61,139,255,.16), 0 10px 22px rgba(27,111,224,.34);
}
.flow-line {
  position: absolute; top: 27px; left: 0; width: 100%; height: 2px; z-index: 1;
  background: linear-gradient(90deg, #D5E4F5, #CFE0F3); 
}
.flow-step:first-child .flow-line { display: none; }
.flow-step h4 { font-size: 16px; margin-bottom: 7px; }
.flow-step p { font-size: 13.5px; color: var(--muted); line-height: 1.65; }

/* ---------- 13. 优势 ---------- */
.adv-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 54px; }
/* 4 项布局必须用修饰类表达四列：基础 .adv-grid 是三列，缺这条会排成 3+1（曾漏写） */
.adv-grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.adv-card {
  padding: 32px 28px; border-radius: var(--radius);
  background: rgba(255,255,255,.045); border: 1px solid rgba(255,255,255,.10);
  transition: background .3s, transform .3s, border-color .3s;
}
.adv-card:hover { background: rgba(255,255,255,.085); border-color: rgba(61,139,255,.4); transform: translateY(-5px); }
.adv-num { font-family: var(--mono); font-size: 13px; color: var(--orange-400); letter-spacing: .14em; margin-bottom: 16px; }
.adv-card h3 { font-size: 18px; margin-bottom: 10px; }
.adv-card p { font-size: 14.5px; color: rgba(255,255,255,.62); line-height: 1.8; }

/* ---------- 14. 工程案例 ---------- */
.proj-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; margin-top: 54px; }
.proj-card {
  border-radius: var(--radius-lg); overflow: hidden; background: #fff;
  border: 1px solid var(--line); transition: transform .3s cubic-bezier(.2,.8,.3,1), box-shadow .3s;
}
.proj-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.proj-thumb {
  position: relative; aspect-ratio: 16 / 10; overflow: hidden;
  display: grid; place-items: center;
  background: linear-gradient(150deg, var(--navy-800), var(--navy-600));
}
.proj-thumb svg { width: 60%; height: auto; opacity: .9; }
.proj-thumb .ph-tag {
  position: absolute; inset: auto 0 0 0; padding: 10px 16px;
  background: linear-gradient(transparent, rgba(4,18,31,.72));
  font-size: 11.5px; color: rgba(255,255,255,.55); letter-spacing: .08em; text-align: center;
}
.proj-kind {
  position: absolute; left: 14px; top: 14px; padding: 5px 12px; border-radius: 7px;
  background: rgba(255,122,24,.94); color: #fff; font-size: 12px; font-weight: 700; letter-spacing: .04em;
}
.proj-body { padding: 24px 24px 28px; }
.proj-body h3 { font-size: 18px; margin-bottom: 9px; }
.proj-body p { font-size: 14px; color: var(--muted); }
.proj-meta { margin-top: 18px; padding-top: 16px; border-top: 1px dashed var(--line); display: flex; justify-content: space-between; font-size: 13px; color: var(--navy-700); }
.proj-meta span { display: inline-flex; align-items: center; gap: 6px; }
.proj-meta svg { width: 14px; height: 14px; color: var(--blue-500); }

/* ---------- 15. CTA 横幅 ---------- */
.cta-band {
  position: relative; overflow: hidden; isolation: isolate;
  padding: 78px 0;
  background: radial-gradient(800px 420px at 84% 20%, #17558C 0%, transparent 62%),
              linear-gradient(120deg, var(--navy-900), var(--navy-700));
}
.cta-band::before {
  content: ""; position: absolute; inset: 0; z-index: -1; opacity: .45;
  background-image: linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px);
  background-size: 54px 54px;
}
.cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 40px; flex-wrap: wrap; }
.cta-inner h2 { font-size: clamp(24px, 3vw, 36px); color: #fff; }
.cta-inner p { margin-top: 14px; color: rgba(255,255,255,.68); font-size: 16px; max-width: 620px; }
.cta-actions { display: flex; gap: 14px; flex-wrap: wrap; flex: none; }

/* ---------- 16. 内页 Hero ---------- */
.page-hero {
  position: relative; padding: 92px 0 84px; overflow: hidden; isolation: isolate;
  margin-top: calc(var(--header-h) * -1);
  padding-top: calc(var(--header-h) + 76px);
  background: radial-gradient(900px 460px at 80% 12%, #14456F 0%, transparent 62%),
              linear-gradient(146deg, var(--navy-950), var(--navy-800) 68%, #0B2E4E);
  color: #fff;
}
.page-hero::before {
  content: ""; position: absolute; inset: 0; z-index: -1; opacity: .45;
  background-image: linear-gradient(rgba(255,255,255,.045) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255,255,255,.045) 1px, transparent 1px);
  background-size: 62px 62px;
  mask-image: radial-gradient(760px 420px at 76% 26%, #000 0%, transparent 74%);
  -webkit-mask-image: radial-gradient(760px 420px at 76% 26%, #000 0%, transparent 74%);
}
.page-hero h1 { font-size: clamp(30px, 4.2vw, 48px); color: #fff; }
.page-hero p { margin-top: 18px; max-width: 660px; color: rgba(255,255,255,.7); font-size: 16.5px; }

.breadcrumb { display: flex; align-items: center; gap: 9px; margin-bottom: 20px; font-size: 13.5px; color: rgba(255,255,255,.55); }
.breadcrumb a:hover { color: #fff; }
.breadcrumb svg { width: 13px; height: 13px; opacity: .6; }
.breadcrumb .cur { color: var(--orange-400); }

/* ---------- 17. 通用内容块 ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 62px; align-items: center; }
.split--rev .split-media { order: 2; }
.prose p + p { margin-top: 18px; }
.prose { font-size: 16px; line-height: 1.95; color: var(--text); }
.prose strong { color: var(--navy-800); font-weight: 700; }
.prose h3 { font-size: 21px; margin: 34px 0 14px; }
.prose h3:first-child { margin-top: 0; }

.check-list { margin-top: 28px; display: grid; gap: 14px; }
.check-list li { display: flex; gap: 12px; align-items: flex-start; font-size: 15.5px; }
.check-list svg { width: 20px; height: 20px; flex: none; margin-top: 4px; color: var(--green-500); }

.media-box {
  border-radius: var(--radius-lg); overflow: hidden; position: relative;
  background: linear-gradient(150deg, var(--navy-800), var(--navy-600));
  aspect-ratio: 4 / 3; display: grid; place-items: center; box-shadow: var(--shadow-lg);
}
.media-box svg { width: 66%; height: auto; opacity: .92; }
.media-box .ph-tag {
  position: absolute; bottom: 0; left: 0; right: 0; padding: 12px; text-align: center;
  background: linear-gradient(transparent, rgba(4,18,31,.75));
  font-size: 11.5px; letter-spacing: .08em; color: rgba(255,255,255,.5);
}

/* 后台「换成实景照片」入口：图没设置时整个元素不占位，
   避免页面上出现一个破图图标（原图是内联 SVG，一直在下面垫着）。 */
.media-img { display: block; width: 100%; height: 100%; object-fit: cover; }
.media-img:not([src]) { display: none; }
.map-box .media-img { border-radius: inherit; }

/* 行内代码片段（测算页那条 CSP 说明里用到） */
.code-tag { font-family: var(--mono); font-size: 13px; }

/* 卡片信息格 */
.tile-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-top: 50px; }
.tile {
  padding: 30px 26px; border-radius: var(--radius); background: #fff;
  border: 1px solid var(--line); transition: transform .28s, box-shadow .28s, border-color .28s;
}
.tile:hover { transform: translateY(-5px); box-shadow: var(--shadow); border-color: #D3E5F8; }
.tile-icon { width: 46px; height: 46px; border-radius: 12px; display: grid; place-items: center; background: var(--blue-100); color: var(--blue-500); margin-bottom: 18px; }
.tile-icon svg { width: 23px; height: 23px; }
.tile h3 { font-size: 17px; margin-bottom: 9px; }
.tile p { font-size: 14.5px; color: var(--muted); }

/* 时间轴 */
.timeline { margin-top: 50px; position: relative; padding-left: 34px; }
.timeline::before { content: ""; position: absolute; left: 7px; top: 8px; bottom: 8px; width: 2px; background: linear-gradient(var(--blue-400), var(--orange-400)); border-radius: 2px; }
.tl-item { position: relative; padding-bottom: 36px; }
.tl-item:last-child { padding-bottom: 0; }
.tl-item::before {
  content: ""; position: absolute; left: -34px; top: 7px; width: 16px; height: 16px; border-radius: 50%;
  background: #fff; border: 3px solid var(--blue-500); box-shadow: 0 0 0 4px rgba(61,139,255,.14);
}
.tl-year { font-family: var(--mono); font-size: 14px; font-weight: 700; color: var(--orange-500); letter-spacing: .06em; }
.tl-item h3 { font-size: 18px; margin: 8px 0 8px; }
.tl-item p { font-size: 15px; color: var(--muted); }

/* ---------- 18. 联系页 ---------- */
.contact-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 34px; align-items: start; }
.info-list { display: grid; gap: 18px; margin-top: 30px; }
.info-item {
  display: flex; gap: 18px; padding: 24px; border-radius: var(--radius);
  background: #fff; border: 1px solid var(--line); transition: box-shadow .28s, transform .28s;
}
.info-item:hover { box-shadow: var(--shadow); transform: translateX(4px); }
.info-icon { width: 46px; height: 46px; flex: none; border-radius: 12px; display: grid; place-items: center; background: var(--blue-100); color: var(--blue-500); }
.info-icon svg { width: 22px; height: 22px; }
.info-item h4 { font-size: 15px; color: var(--muted); font-weight: 500; margin-bottom: 5px; }
.info-item .val { font-size: 17px; font-weight: 700; color: var(--navy-800); word-break: break-all; }
.info-item .val--sm { font-size: 15px; }

.form-card { padding: 36px; border-radius: var(--radius-lg); background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow); }
.form-card h3 { font-size: 21px; margin-bottom: 8px; }
.form-card > p { font-size: 14.5px; color: var(--muted); margin-bottom: 26px; }
.field { margin-bottom: 18px; }
.field label { display: block; font-size: 13.5px; font-weight: 600; color: var(--navy-700); margin-bottom: 8px; }
.field label .req { color: var(--orange-500); }
.field input, .field select, .field textarea {
  width: 100%; padding: 13px 15px; border-radius: 10px; font-family: inherit; font-size: 15px;
  color: var(--ink); background: var(--bg-soft); border: 1px solid transparent; outline: none;
  transition: border-color .2s, background .2s, box-shadow .2s;
}
.field textarea { min-height: 120px; resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus {
  background: #fff; border-color: var(--blue-400); box-shadow: 0 0 0 4px rgba(61,139,255,.12);
}
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-note { margin-top: 16px; font-size: 13px; color: var(--muted); }
.form-msg {
  display: none; margin-bottom: 18px; padding: 13px 16px; border-radius: 10px;
  background: #E8FAF3; border: 1px solid #B6EBD8; color: #0A7A56; font-size: 14.5px;
}
.form-msg.is-show { display: block; }

.map-box {
  margin-top: 30px; border-radius: var(--radius-lg); overflow: hidden;
  border: 1px solid var(--line); background: var(--bg-soft-2);
  aspect-ratio: 21 / 7; display: grid; place-items: center; text-align: center; padding: 30px;
}
.map-box svg { width: 46px; height: 46px; color: var(--blue-400); margin: 0 auto 14px; }
.map-box p { font-size: 14.5px; color: var(--muted); }
.map-box b { color: var(--navy-800); }
/* 图形版：用于整幅示意图，不受上面的图标尺寸限制 */
.map-box--figure { padding: 0; display: block; background: #EAF2FA; }
.map-box--figure svg { width: 100%; height: auto; margin: 0; display: block; color: inherit; }
@media (max-width: 680px) {
  .map-box--figure { aspect-ratio: 4 / 3; }
  .map-box--figure svg { height: 100%; }
}

/* ---------- 19. 页脚 ---------- */
.footer { background: var(--navy-950); color: rgba(255,255,255,.6); padding: 70px 0 0; font-size: 14.5px; }
.footer-top { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.3fr; gap: 48px; padding-bottom: 52px; }
.footer .logo-name { color: #fff; }
.footer .logo-slogan { color: rgba(255,255,255,.42); }
.footer-about { margin-top: 22px; line-height: 1.9; font-size: 14px; color: rgba(255,255,255,.55); max-width: 320px; }
.footer h4 { color: #fff; font-size: 15.5px; margin-bottom: 20px; font-weight: 700; letter-spacing: .02em; }
.footer-links { display: grid; gap: 12px; }
.footer-links a:hover { color: #fff; padding-left: 4px; }
.footer-links a { transition: color .2s, padding-left .2s; }
.footer-contact { display: grid; gap: 16px; }
.footer-contact li { display: flex; gap: 11px; align-items: flex-start; line-height: 1.7; }
.footer-contact svg { width: 16px; height: 16px; flex: none; margin-top: 4px; color: var(--blue-400); }
.footer-contact b { color: #fff; font-weight: 700; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.09); padding: 24px 0;
  display: flex; justify-content: space-between; align-items: center; gap: 18px; flex-wrap: wrap;
  font-size: 13.5px; color: rgba(255,255,255,.42);
}
.footer-bottom a:hover { color: rgba(255,255,255,.85); }
.footer-bottom .sep { margin: 0 8px; opacity: .4; }

/* 悬浮咨询条 */
.float-bar {
  position: fixed; right: 22px; bottom: 26px; z-index: 90;
  display: flex; flex-direction: column; gap: 10px;
}
.float-btn {
  width: 52px; height: 52px; border-radius: 50%; display: grid; place-items: center;
  background: #fff; border: 1px solid var(--line); color: var(--blue-500);
  box-shadow: var(--shadow); transition: transform .24s, background .24s, color .24s;
}
.float-btn:hover { transform: translateY(-3px) scale(1.05); }
.float-btn svg { width: 22px; height: 22px; }
.float-btn--top { opacity: 0; pointer-events: none; }
.float-btn--top.is-show { opacity: 1; pointer-events: auto; }
.float-btn--main { width: 58px; height: 58px; background: linear-gradient(140deg, var(--orange-500), var(--orange-400)); color: #fff; border-color: transparent; box-shadow: 0 12px 28px rgba(255,122,24,.4); }

/* ---------- 20. 滚动动效 ---------- */
/* 用 CSS 滚动驱动动画（animation-timeline: view()）实现，不用 JS：
   动画进度是「元素与滚动位置的关系」这一纯函数，不是由事件触发的一次性状态。
   所以快速滑动不会漏判、不占主线程、不产生逐帧重排，元素一旦划过就一定处于终态。

   ⚠️ 为什么放弃之前的 IntersectionObserver + reveal-anim 方案（事故档案）：
   1) 曾写成 html.reveal-anim .reveal { opacity:0 }，特异度 (0,2,1) 高于
      .reveal.is-in (0,2,0)，导致整站 38 个区块永久 opacity:0、首屏以下全白；
   2) IO 每帧只采样一次，快速滑动时若元素被「跳」过去，就永远不会上报
      isIntersecting，该区块会一直停在透明状态。实测快速滚动后 21/38 个区块未显现。

   现在的规则：
   - 隐藏只存在于 @supports (animation-timeline: view()) 块内，
     不支持该特性的浏览器整块规则不生效 —— 内容以静态方式完整显示。
   - animation-range 的起点统一为 cover 0%（元素刚露头就开始淡入），
     只拉开终点做错落感，避免出现「已进入屏幕却仍然全透明」的窗口。
   - 位移用独立的 translate 属性，不与卡片 hover 的 transform 冲突。 */
@keyframes revealUp {
  from { opacity: 0; translate: 0 20px; }
  to   { opacity: 1; translate: 0 0; }
}
@supports (animation-timeline: view()) {
  /* 注意：滚动时间轴下不能给固定时长（.6s 之类），否则动画只映射到一小段
     时间进度，元素滑到视口中部仍停在半透明（实测 0.49~0.76）。
     规范写法是 animation-duration: auto —— 让动画完整占据 animation-range。 */
  .reveal {
    animation-name: revealUp;
    animation-duration: auto;
    animation-timing-function: linear;
    animation-fill-mode: both;
    animation-timeline: view();
    animation-range: cover 0% cover 22%;
  }
  .reveal-d1 { animation-range: cover 0% cover 28%; }
  .reveal-d2 { animation-range: cover 0% cover 34%; }
  .reveal-d3 { animation-range: cover 0% cover 40%; }
  .reveal-d4 { animation-range: cover 0% cover 46%; }
  .reveal-d5 { animation-range: cover 0% cover 52%; }
}
/* JS 自检发现滚动驱动动画失效时，给 html 加 no-scroll-anim，直接静态呈现 */
html.no-scroll-anim .reveal,
html.no-scroll-anim .reveal-d1, html.no-scroll-anim .reveal-d2,
html.no-scroll-anim .reveal-d3, html.no-scroll-anim .reveal-d4,
html.no-scroll-anim .reveal-d5 {
  animation: none !important; opacity: 1 !important; translate: none !important;
}
/* 用户要求减少动态，或打印 / 导出 PDF 时：一律静态呈现 */
@media (prefers-reduced-motion: reduce) {
  .reveal { animation: none !important; opacity: 1 !important; translate: none !important; }
  html { scroll-behavior: auto; }
}

/* ---------- 21. 响应式 ---------- */
@media (max-width: 1080px) {
  .hero-grid { grid-template-columns: 1fr; gap: 48px; }
  .hero-visual { max-width: 620px; margin: 0 auto; width: 100%; }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 40px; }
  .flow { grid-template-columns: repeat(3, 1fr); gap: 34px 0; }
  .flow-step:nth-child(4) .flow-line { display: none; }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 900px) {
  .section { padding: 72px 0; }
  .nav, .header-tel { display: none; }
  .nav-toggle { display: flex; margin-left: auto; }
  .nav {
    position: fixed; left: 0; right: 0; top: calc(var(--header-h) + 38px);
    flex-direction: column; align-items: stretch; gap: 2px;
    padding: 14px 20px 22px; background: #fff;
    border-bottom: 1px solid var(--line); box-shadow: 0 20px 40px rgba(10,37,64,.14);
    transform: translateY(-12px); opacity: 0; pointer-events: none;
    transition: opacity .26s, transform .26s;
    max-height: calc(100vh - var(--header-h) - 38px); overflow-y: auto;
  }
  .nav.is-open { display: flex; transform: none; opacity: 1; pointer-events: auto; }
  .nav-link { padding: 14px 12px; font-size: 16px; border-radius: 10px; }
  .nav-link::after { display: none; }
  .nav-link.is-active { background: var(--blue-100); }
  .nav-mobile-tel { display: inline-flex; margin-top: 12px; }
  body.page-home .header:not(.is-stuck) .nav-link { color: var(--text); }
  body.page-home .header:not(.is-stuck) .nav-link.is-active { color: var(--blue-500); background: var(--blue-100); }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .stat:nth-child(2) { border-right: 0; }
  .stat:nth-child(-n+2) { border-bottom: 1px solid rgba(255,255,255,.09); }
  .biz-grid, .qual-grid, .adv-grid, .proj-grid, .tile-grid { grid-template-columns: 1fr; }
  .split { grid-template-columns: 1fr; gap: 40px; }
  .split--rev .split-media { order: 0; }
  .topbar-left .topbar-item:not(:first-child),
  .topbar-left .dot { display: none; }
}

@media (max-width: 680px) {
  :root { --header-h: 66px; }
  .container { padding: 0 18px; }
  .section { padding: 58px 0; }
  .topbar { height: 34px; font-size: 12px; }
  .topbar-left .topbar-item { display: none; }
  .topbar-left .dot { display: none; }
  .nav { top: calc(var(--header-h) + 34px); max-height: calc(100vh - var(--header-h) - 34px); }
  .logo-mark { width: 34px; height: 34px; }
  img.logo-mark--img { height: 34px; }
  .logo-name { font-size: 15.5px; }
  .logo-slogan { font-size: 9.5px; letter-spacing: .1em; }
  .hero { padding: calc(var(--header-h) + 52px) 0 70px; }
  .hero-actions .btn { flex: 1 1 100%; }
  .hero-tag { font-size: 12.5px; padding: 7px 12px; }
  /* 模式小方框：窄屏改两列，避免「绿电直连离网电站」这类长标签折行 */
  .mode-strip { margin-top: 16px; }
  .mode-chips { grid-template-columns: 1fr 1fr; gap: 8px; margin-top: 11px; }
  .mode-chip { font-size: 12.5px; padding: 8px 11px; min-height: 42px; gap: 7px; }
  .page-hero { padding: calc(var(--header-h) + 50px) 0 62px; }
  .flow { grid-template-columns: 1fr 1fr; gap: 30px 0; }
  .flow-step:nth-child(3) .flow-line { display: none; }
  .flow-step:nth-child(5) .flow-line { display: none; }
  .qual-card { flex-direction: column; gap: 18px; padding: 26px; }
  .field-row { grid-template-columns: 1fr; }
  .form-card { padding: 26px 22px; }
  .footer-top { grid-template-columns: 1fr; gap: 34px; }
  .cta-band { padding: 58px 0; }
  .cta-actions { width: 100%; }
  .cta-actions .btn { flex: 1 1 100%; }
  .float-bar { right: 14px; bottom: 18px; }
  .float-btn { width: 46px; height: 46px; }
  .float-btn--main { width: 52px; height: 52px; }
  .footer-bottom { justify-content: center; text-align: center; }
}

@media (max-width: 420px) {
  .flow { grid-template-columns: 1fr; }
  .flow-line { display: none !important; }
  .stats-grid { grid-template-columns: 1fr; }
  .stat { border-right: 0 !important; border-bottom: 1px solid rgba(255,255,255,.09); }
  .stat:last-child { border-bottom: 0; }
}

/* ---------- 22. 打印 ---------- */
@media print {
  .header, .topbar, .float-bar, .cta-band, .footer { display: none; }
  body { color: #000; }
  .section { padding: 20px 0; }
  /* 打印时滚动驱动动画没有意义，必须静态呈现，否则会打出空白页 */
  .reveal,
  .reveal-d1, .reveal-d2, .reveal-d3, .reveal-d4, .reveal-d5 {
    animation: none !important; opacity: 1 !important; translate: none !important;
  }
}

/* ==========================================================================
   23. 多级导航（下拉菜单）
   ========================================================================== */
.nav-item { position: relative; }
.nav-item > .nav-link { display: inline-flex; align-items: center; gap: 5px; }
.nav-caret { width: 11px; height: 11px; flex: none; opacity: .55; transition: transform .25s; }
.nav-item:hover > .nav-link .nav-caret { transform: rotate(180deg); }

.dropdown {
  position: absolute; left: 50%; top: calc(100% + 8px);
  transform: translateX(-50%) translateY(6px);
  min-width: 198px; padding: 10px;
  background: #fff; border: 1px solid var(--line); border-radius: 14px;
  box-shadow: 0 20px 46px rgba(10, 37, 64, .16);
  opacity: 0; visibility: hidden; pointer-events: none;
  transition: opacity .22s, transform .22s, visibility .22s;
  z-index: 120;
}
/* 悬停缓冲带：避免鼠标移动过程中菜单闪退 */
.dropdown::before { content: ""; position: absolute; left: 0; right: 0; top: -12px; height: 12px; }

.nav-item:hover > .dropdown,
.nav-item:focus-within > .dropdown,
.nav-item.is-open > .dropdown {
  opacity: 1; visibility: visible; pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.dropdown a {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 14px; border-radius: 9px;
  font-size: 14.5px; color: var(--text); white-space: nowrap;
  transition: background .18s, color .18s;
}
.dropdown a::before {
  content: ""; width: 5px; height: 5px; border-radius: 50%; flex: none;
  background: var(--blue-400); opacity: .4; transition: opacity .18s, transform .18s;
}
.dropdown a:hover { background: var(--bg-soft); color: var(--blue-600); }
.dropdown a:hover::before { opacity: 1; transform: scale(1.5); }

/* 首页透明导航时，下拉内容仍是白底深字 */
body.page-home .header:not(.is-stuck) .dropdown a { color: var(--text); }
body.page-home .header:not(.is-stuck) .dropdown a:hover { color: var(--blue-600); }

/* 导航右侧主 CTA 按钮 */
.nav-cta { margin-left: 8px; flex: none; }
.nav-cta svg { width: 16px; height: 16px; }

/* ==========================================================================
   24. 平板 / 移动端：折叠为抽屉式菜单（含二级展开）
   ========================================================================== */
/* 窄桌面区间：导航项多，先收起右侧电话胶囊，避免与导航/CTA 重叠 */
/* ---- 31. 工具启动台（外链测算模型）---- */
.tool-shell {
  margin-top: 44px; border-radius: var(--radius-lg); overflow: hidden;
  background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow-lg);
}
.tool-chrome {
  display: flex; align-items: center; gap: 14px; padding: 11px 18px;
  background: linear-gradient(160deg, var(--navy-800), var(--navy-900));
}
.tool-chrome .dots { display: flex; gap: 6px; flex: none; }
.tool-chrome .dots i { display: block; width: 9px; height: 9px; border-radius: 50%; background: rgba(255,255,255,.2); }
.tool-chrome .dots i:first-child { background: rgba(255,122,24,.7); }
.tool-chrome .url {
  flex: 1; min-width: 0; display: block; overflow: hidden; white-space: nowrap; text-overflow: ellipsis;
  padding: 6px 13px; border-radius: 8px; background: rgba(255,255,255,.08);
  font-family: var(--mono); font-size: 12px; color: rgba(255,255,255,.72); letter-spacing: .01em;
}
.tool-chrome .st { flex: none; display: inline-flex; align-items: center; gap: 7px; font-size: 12px; font-weight: 700; color: #7FE3B4; }
.tool-chrome .st i { width: 7px; height: 7px; border-radius: 50%; background: var(--green-500); box-shadow: 0 0 0 3px rgba(18,185,129,.22); }

/* 内嵌测算模型（同域 iframe，2026-10-06 计算器接入官网） */
.tool-embed { position: relative; background: var(--bg-soft); border-bottom: 1px solid var(--line); }
.tool-embed iframe { display: block; width: 100%; height: min(1400px, 86vh); border: 0; }
@media (max-width: 860px) { .tool-embed iframe { height: 78vh; min-height: 560px; } }

.tool-preview { position: relative; display: block; overflow: hidden; background: var(--bg-soft); }
.tool-preview img { display: block; width: 100%; height: auto; transition: transform .55s cubic-bezier(.2,.8,.3,1); }
.tool-preview:hover img { transform: scale(1.012); }
.tool-preview .mask {
  position: absolute; inset: 0; display: grid; place-items: center; opacity: 0;
  background: linear-gradient(180deg, rgba(6,25,43,.06), rgba(6,25,43,.6));
  transition: opacity .3s;
}
.tool-preview:hover .mask { opacity: 1; }
.tool-preview .mask b {
  display: inline-flex; align-items: center; gap: 10px; padding: 15px 28px; border-radius: 999px;
  background: #fff; color: var(--navy-800); font-size: 15.5px; font-weight: 700;
  box-shadow: 0 20px 44px rgba(4,18,31,.4);
}
.tool-preview .mask b svg { width: 18px; height: 18px; color: var(--orange-500); }
body.page-calculator .tool-preview .mask { opacity: 1; align-items: end; padding-bottom: 26px; background: linear-gradient(180deg, rgba(6,25,43,0) 52%, rgba(6,25,43,.72)); }
body.page-calculator .tool-preview:hover .mask { background: linear-gradient(180deg, rgba(6,25,43,.1) 20%, rgba(6,25,43,.76)); }

.tool-foot {
  display: flex; align-items: center; justify-content: space-between; gap: 18px; flex-wrap: wrap;
  padding: 18px 22px; background: var(--navy-800); color: #fff;
}
.tool-foot .txt { min-width: 0; }
.tool-foot .txt b { display: block; font-size: 15.5px; }
.tool-foot .txt span { display: block; margin-top: 5px; font-size: 13px; color: rgba(255,255,255,.62); }
.tool-foot .acts { display: flex; gap: 10px; flex-wrap: wrap; }
.btn--copied { background: var(--green-500) !important; border-color: transparent !important; color: #fff !important; }
.tool-feats { display: grid; gap: 11px; margin-top: 24px; }
.tool-feats li { display: flex; gap: 11px; align-items: flex-start; font-size: 14.5px; color: var(--text); }
.tool-feats li svg { width: 18px; height: 18px; flex: none; margin-top: 3px; color: var(--blue-500); }
.tool-feats li b { color: var(--navy-800); }

/* ---- 32. 通用规范文本块（免责/说明）---- */
.legal-note {
  display: flex; gap: 13px; align-items: flex-start; margin-top: 22px; padding: 18px 22px;
  border-radius: 14px; background: var(--bg-soft); border: 1px solid var(--line);
}
.legal-note svg { width: 19px; height: 19px; flex: none; margin-top: 2px; color: var(--muted); }
.legal-note p { font-size: 14px; color: var(--muted); }
.legal-note p + p { margin-top: 8px; }
.legal-note b { color: var(--navy-700); }

/* 窄桌面 / 平板横屏：收起右侧电话胶囊并收紧导航间距，避免与导航/CTA 重叠 */
@media (min-width: 1001px) and (max-width: 1330px) {
  .header-tel { display: none; }
  .nav-link { padding: 9px 11px; font-size: 14px; }
  .nav-link::after { left: 11px; right: 11px; }
  .nav-cta.btn--sm { padding: 0 16px; }
}

/* ≤1000px（手机 / 竖屏平板）折叠为抽屉式导航 */
@media (max-width: 1000px) {
  .nav-toggle { display: flex; margin-left: auto; }
  .header-tel { display: none; }

  .nav {
    display: flex;
    position: fixed; left: 0; right: 0;
    top: calc(var(--header-h) + var(--topbar-h, 38px));
    flex-direction: column; align-items: stretch; gap: 2px;
    margin-left: 0; padding: 14px 20px 26px;
    background: #fff; border-bottom: 1px solid var(--line);
    box-shadow: 0 22px 44px rgba(10, 37, 64, .16);
    transform: translateY(-12px); opacity: 0; pointer-events: none;
    transition: opacity .26s, transform .26s;
    max-height: calc(100vh - var(--header-h) - var(--topbar-h, 38px));
    overflow-y: auto; -webkit-overflow-scrolling: touch;
    overscroll-behavior: contain;
  }
  .nav.is-open { transform: none; opacity: 1; pointer-events: auto; }

  .nav-item { position: static; }
  .nav-link { padding: 15px 14px; font-size: 16.5px; border-radius: 10px; }
  .nav-link::after { display: none; }
  .nav-link.is-active { background: var(--blue-100); color: var(--blue-600); }
  .nav-item > .nav-link { justify-content: space-between; }
  .nav-caret { width: 14px; height: 14px; opacity: .45; }

  .dropdown {
    position: static; transform: none; min-width: 0;
    padding: 0 0 8px 14px; margin: 0;
    background: transparent; border: 0; box-shadow: none;
    opacity: 1; visibility: visible; pointer-events: auto;
    display: none;
  }
  .dropdown::before { display: none; }
  /* 同名展开规则在桌面端带 translateX(-50%)（特异性更高），
     此处必须显式重置，否则子菜单展开后整体左移一半宽度、文字跑出屏幕 */
  .nav-item.is-open > .dropdown { display: block; transform: none; left: auto; top: auto; }
  .nav-item.is-open .nav-caret { transform: rotate(180deg); }
  .dropdown a { padding: 13px 14px; font-size: 15.5px; color: var(--muted); min-height: 46px; }
  .dropdown a:hover { background: transparent; }

  .nav-cta { margin: 16px 0 0; width: 100%; height: 50px; }

  /* 首页透明导航：抽屉展开后统一用深色文字 */
  body.page-home .header:not(.is-stuck) .nav-link { color: var(--text); }
  body.page-home .header:not(.is-stuck) .nav-link.is-active { color: var(--blue-600); background: var(--blue-100); }
}

@media (max-width: 680px) {
  :root { --topbar-h: 34px; }
  .nav {
    top: calc(var(--header-h) + var(--topbar-h));
    max-height: calc(100vh - var(--header-h) - var(--topbar-h));
  }
}

/* ==========================================================================
   25. 触摸设备优化（平板 / 手机）
   ========================================================================== */
@media (hover: none) {
  /* 触摸屏没有 hover，用按下态给反馈 */
  .btn:active { transform: translateY(0) scale(.985); }
  .biz-card:active, .proj-card:active, .tile:active, .qual-card:active { transform: translateY(-2px); }
  /* 触摸设备上卡片始终显示顶部渐变条，避免"看起来不可点" */
  .biz-card::after { transform: scaleX(1); opacity: .5; }
  .dropdown a:active { background: var(--bg-soft); }
  .float-btn:hover { transform: none; }
}
/* 触摸目标不小于 44px */
@media (max-width: 1120px) {
  .nav-link, .dropdown a, .biz-nav a, .float-btn { min-height: 44px; }
  .biz-nav a { display: inline-flex; align-items: center; }
}

/* 触屏设备上禁用会干扰滚动的过渡动画 */
@media (prefers-reduced-motion: reduce), (hover: none) {
  html { scroll-behavior: auto; }
}

/* 横屏平板：适度收紧纵向留白，让一屏能装下更多内容 */
@media (min-width: 768px) and (max-width: 1120px) and (orientation: landscape) {
  .section { padding: 68px 0; }
  .hero { padding: calc(var(--header-h) + 56px) 0 76px; }
  .page-hero { padding: calc(var(--header-h) + 52px) 0 62px; }
}

/* ==========================================================================
   26. 新增组件：应用场景 / 合作模式 / 认证徽章 / 方案测算页
   ========================================================================== */

/* ---- 应用场景卡 ---- */
.scene-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 20px; margin-top: 52px; }
.scene-card {
  position: relative; padding: 30px 26px 28px; border-radius: var(--radius-lg);
  background: #fff; border: 1px solid var(--line); overflow: hidden;
  transition: transform .28s cubic-bezier(.2,.8,.3,1), box-shadow .28s, border-color .28s;
}
.scene-card::before {
  content: ""; position: absolute; right: -30px; top: -30px; width: 96px; height: 96px;
  border-radius: 50%; background: var(--blue-100); opacity: .55; transition: transform .35s, opacity .35s;
}
.scene-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }
.scene-card:hover::before { transform: scale(1.5); opacity: .35; }
.scene-icon {
  position: relative; width: 52px; height: 52px; border-radius: 14px; display: grid; place-items: center;
  background: linear-gradient(140deg, var(--blue-500), var(--blue-600)); color: #fff;
  box-shadow: 0 10px 22px rgba(27,111,224,.28); margin-bottom: 20px;
}
.scene-icon svg { width: 26px; height: 26px; }
.scene-card h3 { position: relative; font-size: 17.5px; margin-bottom: 9px; }
.scene-card p { position: relative; font-size: 14.5px; color: var(--muted); }

/* ---- 合作模式卡 ---- */
.coop-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px; margin-top: 52px; }
/* 同上：4 项合作模式走这个修饰类，否则桌面端排成 3+1 */
.coop-grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.coop-card {
  padding: 34px 30px; border-radius: var(--radius-lg);
  background: #fff; border: 1px solid var(--line);
  transition: transform .28s cubic-bezier(.2,.8,.3,1), box-shadow .28s, border-color .28s;
}
.coop-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: #CFE3F8; }
.coop-no {
  display: inline-grid; place-items: center; width: 40px; height: 40px; border-radius: 12px;
  background: var(--navy-800); color: #fff; font-family: var(--mono); font-size: 15px; font-weight: 700;
  margin-bottom: 18px;
}
.coop-card h3 { font-size: 19px; margin-bottom: 6px; }
.coop-card .en { font-size: 12px; letter-spacing: .1em; color: var(--blue-500); text-transform: uppercase; font-weight: 600; margin-bottom: 14px; }
/* 英文副标为选填：留空时不占位，避免各卡片标题高度参差 */
.coop-card .en:empty { display: none; }
.coop-card p { font-size: 14.5px; color: var(--muted); }
.coop-card .for { margin-top: 18px; padding-top: 16px; border-top: 1px dashed var(--line); font-size: 13.5px; color: var(--navy-700); }
.coop-card .for b { color: var(--orange-500); }

/* ---- 认证徽章 ---- */
.cert-badges { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; margin-top: 44px; }
.cert-badge-card {
  display: flex; align-items: center; gap: 18px; padding: 26px 24px;
  border-radius: var(--radius); background: #fff; border: 1px solid var(--line);
  transition: box-shadow .28s, transform .28s;
}
.cert-badge-card:hover { box-shadow: var(--shadow); transform: translateY(-4px); }
.cert-mark {
  width: 54px; height: 54px; flex: none; border-radius: 50%; display: grid; place-items: center;
  background: linear-gradient(150deg, var(--navy-700), var(--navy-900)); color: #fff;
  font-family: var(--mono); font-size: 11px; font-weight: 700; letter-spacing: .04em;
}
.cert-badge-card b { display: block; font-size: 16px; color: var(--navy-800); }
.cert-badge-card small { display: block; font-size: 12.5px; color: var(--muted); margin-top: 4px; letter-spacing: .02em; }

/* ---- 方案测算（iframe 嵌入）---- */
.calc-shell {
  border-radius: var(--radius-lg); overflow: hidden;
  border: 1px solid var(--line); background: #fff; box-shadow: var(--shadow-lg);
}
.calc-bar {
  display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  padding: 16px 22px; background: var(--navy-800); color: #fff;
}
.calc-bar .t { display: flex; align-items: center; gap: 11px; font-size: 15px; font-weight: 600; }
.calc-bar .t svg { width: 18px; height: 18px; color: var(--orange-400); flex: none; }
.calc-bar .acts { display: flex; gap: 10px; flex-wrap: wrap; }
.calc-frame { position: relative; background: var(--bg-soft); }
.calc-frame iframe { display: block; width: 100%; height: 76vh; min-height: 560px; border: 0; background: #fff; }
.calc-loading {
  position: absolute; inset: 0; display: grid; place-items: center; gap: 14px;
  background: var(--bg-soft); color: var(--muted); font-size: 14.5px; text-align: center; padding: 30px;
  transition: opacity .4s, visibility .4s;
}
.calc-loading.is-hidden { opacity: 0; visibility: hidden; }
.calc-loading .sp {
  width: 34px; height: 34px; border-radius: 50%; margin: 0 auto 14px;
  border: 3px solid #CFE0F3; border-top-color: var(--blue-500); animation: calcspin .8s linear infinite;
}
@keyframes calcspin { to { transform: rotate(360deg); } }
.calc-tip {
  display: flex; gap: 12px; align-items: flex-start; margin-top: 22px; padding: 18px 22px;
  border-radius: 14px; background: var(--blue-100); border: 1px solid #CFE3F8;
}
.calc-tip svg { width: 19px; height: 19px; flex: none; margin-top: 3px; color: var(--blue-600); }
.calc-tip p { font-size: 14.5px; color: var(--navy-700); }

/* ---- 28. 设备提示：测算模型请用电脑打开 ---- */
/* 放在测算页预览图上方，手机端同样显示而且更醒目（手机上表格确实挤） */
.device-note {
  display: flex; align-items: flex-start; gap: 14px;
  margin: 0 auto 22px; max-width: 820px;
  padding: 16px 22px; border-radius: 14px;
  background: linear-gradient(120deg, #FFF3E4, #FFFBF6);
  border: 1px solid #F8D3A8;
}
.device-note svg { width: 22px; height: 22px; flex: none; margin-top: 2px; color: #C2570A; }
.device-note b { display: block; font-size: 15.5px; color: #A94A06; margin-bottom: 3px; }
.device-note span { display: block; font-size: 14px; line-height: 1.7; color: var(--navy-700); }
.device-note em { font-style: normal; font-weight: 700; color: #A94A06; }

/* 首页 CTA 深色带上的紧凑版提示 */
.cta-hint {
  display: inline-flex; align-items: center; gap: 8px; margin-top: 16px;
  padding: 8px 15px; border-radius: 999px;
  background: rgba(255,255,255,.10); border: 1px solid rgba(255,255,255,.22);
  font-size: 13.5px; color: rgba(255,255,255,.86);
}
.cta-hint svg { width: 15px; height: 15px; flex: none; color: var(--orange-400); }

@media (max-width: 680px) {
  .device-note { padding: 14px 16px; gap: 11px; margin-bottom: 18px; border-radius: 12px; }
  .device-note svg { width: 20px; height: 20px; }
  .device-note b { font-size: 15px; }
  .device-note span { font-size: 13.5px; line-height: 1.65; }
  .cta-hint { display: flex; width: 100%; border-radius: 12px; font-size: 13px; line-height: 1.55; }
}

/* ---- 27. 对比表格（合作模式等）---- */
.cmp-wrap {
  margin-top: 40px; border-radius: var(--radius-lg); overflow: hidden;
  border: 1px solid var(--line); background: #fff; box-shadow: var(--shadow);
}
.cmp-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.cmp-table { width: 100%; min-width: 720px; border-collapse: collapse; }
.cmp-table th, .cmp-table td {
  padding: 17px 20px; text-align: left; font-size: 14.5px; line-height: 1.65;
  border-bottom: 1px solid var(--line); vertical-align: top;
}
.cmp-table thead th {
  background: linear-gradient(160deg, var(--navy-800), var(--navy-900));
  color: #fff; font-size: 14px; font-weight: 700; letter-spacing: .02em; white-space: nowrap;
}
.cmp-table thead th:first-child { color: rgba(255,255,255,.72); font-weight: 600; }
.cmp-table tbody th {
  background: var(--bg-soft); color: var(--navy-800); font-weight: 700; white-space: nowrap;
  border-right: 1px solid var(--line);
}
.cmp-table tbody tr:last-child th, .cmp-table tbody tr:last-child td { border-bottom: 0; }
.cmp-table tbody tr:hover td { background: #F7FBFF; }
.cmp-table .hl { color: var(--orange-500); font-weight: 700; }
.cmp-table .ok { color: var(--navy-700); font-weight: 600; }
.cmp-scroll-hint { display: none; padding: 10px 20px; font-size: 12.5px; color: var(--muted); background: var(--bg-soft); border-top: 1px solid var(--line); }

/* ---- 28. 筛选栏（工程案例）---- */
.filter-bar { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 34px; }
.filter-btn {
  display: inline-flex; align-items: center; gap: 8px; min-height: 44px;
  padding: 0 20px; border-radius: 999px; font-size: 14.5px; font-weight: 600;
  background: #fff; color: var(--navy-700); border: 1px solid var(--line);
  cursor: pointer; transition: all .24s;
}
.filter-btn:hover { border-color: var(--blue-400); color: var(--blue-600); }
.filter-btn.is-on {
  background: linear-gradient(140deg, var(--blue-500), var(--navy-700));
  border-color: transparent; color: #fff; box-shadow: 0 10px 22px -10px rgba(27,76,158,.62);
}
.filter-btn .n { font-size: 12px; opacity: .7; font-family: var(--mono); }
.proj-grid [hidden] { display: none !important; }
@keyframes filterIn { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: none; } }

/* ---- 29. 数据条 / 亮点带 ---- */
.stat-band {
  display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1px;
  background: var(--line); border: 1px solid var(--line);
  border-radius: var(--radius-lg); overflow: hidden; margin-top: 46px;
}
.stat-band > div { background: #fff; padding: 26px 22px; text-align: center; }
.stat-band b { display: block; font-size: clamp(24px, 3vw, 34px); color: var(--navy-800); font-family: var(--mono); letter-spacing: -.01em; }
.stat-band b em { font-style: normal; font-size: 15px; color: var(--blue-500); margin-left: 3px; font-family: var(--font); }
.stat-band span { display: block; margin-top: 8px; font-size: 13.5px; color: var(--muted); }

/* ---- 30. 文档清单 ---- */
.doc-list { display: grid; gap: 12px; margin-top: 30px; }
.doc-list li {
  display: flex; gap: 14px; align-items: flex-start; padding: 16px 20px;
  border-radius: 14px; background: #fff; border: 1px solid var(--line); font-size: 14.5px; color: var(--navy-700);
}
.doc-list li svg { width: 19px; height: 19px; flex: none; margin-top: 2px; color: var(--blue-500); }
.doc-list li b { color: var(--navy-800); }

/* ---- 30.1 常见问题 FAQ（原生 details，无 JS 依赖） ---- */
.faq-list { max-width: 860px; margin: 44px auto 0; display: grid; gap: 14px; }
.faq-item {
  background: #fff; border: 1px solid var(--line); border-radius: 14px;
  overflow: hidden; transition: box-shadow .25s, border-color .25s;
}
.faq-item[open] { border-color: var(--blue-300, #BBD8F5); box-shadow: var(--shadow-md, 0 10px 28px rgba(10,37,64,.08)); }
.faq-item summary {
  list-style: none; cursor: pointer; display: flex; align-items: center; justify-content: space-between;
  gap: 16px; padding: 19px 22px; font-weight: 600; font-size: 15.5px; color: var(--navy-800); min-height: 44px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary:hover { color: var(--blue-600); }
.faq-caret {
  flex: none; width: 26px; height: 26px; border-radius: 8px; position: relative;
  background: var(--blue-100, #E4F0FC); transition: transform .25s, background .25s;
}
.faq-caret::before, .faq-caret::after {
  content: ""; position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%);
  background: var(--blue-600, #1B6FE0); border-radius: 2px;
}
.faq-caret::before { width: 10px; height: 2px; }
.faq-caret::after { width: 2px; height: 10px; transition: opacity .2s; }
.faq-item[open] .faq-caret { transform: rotate(90deg); }
.faq-item[open] .faq-caret::after { opacity: 0; }
.faq-a { padding: 0 22px 20px; }
.faq-a p { margin: 0; font-size: 14.5px; line-height: 1.95; color: var(--muted); }
@media (max-width: 680px) {
  .faq-item summary { padding: 16px 16px; font-size: 14.5px; }
  .faq-a { padding: 0 16px 18px; }
}

@media (max-width: 1080px) {
  .scene-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .coop-grid, .coop-grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .adv-grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .cert-badges { grid-template-columns: 1fr; }
  .stat-band { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .cmp-scroll-hint { display: block; }
  /* 窄屏下固定表格首列，横向滑动时维度名称不丢失 */
  .cmp-table thead th:first-child { position: sticky; left: 0; z-index: 3; }
  .cmp-table tbody th {
    position: sticky; left: 0; z-index: 2;
    box-shadow: 1px 0 0 var(--line), 8px 0 14px -8px rgba(10,37,64,.16);
  }
}
@media (max-width: 680px) {
  /* 手机上一律单列。注意必须把 --4 修饰类一并列出：
     修饰类（0-1-0）与基类（0-1-0）特异度相同，靠源码顺序取胜，
     而 ≤1080 的 2 列规则在源码中更靠后，会压掉基类的单列规则
     —— 曾导致 .adv-grid--4 在 390px 仍是 2 列、卡片被挤到 165px 宽、文字折 6 行。 */
  .scene-grid, .coop-grid, .coop-grid--4, .adv-grid, .adv-grid--4 {
    grid-template-columns: 1fr; gap: 18px;
  }
  .calc-frame iframe { height: 70vh; min-height: 480px; }
  .calc-bar { padding: 14px 18px; }
  .calc-bar .t { font-size: 14px; }
  .cert-badge-card { padding: 22px 20px; gap: 14px; }
  .cmp-table th, .cmp-table td { padding: 14px 16px; font-size: 13.5px; }
  .filter-bar { gap: 8px; }
  .filter-btn { padding: 0 15px; font-size: 13.5px; }
  .stat-band > div { padding: 20px 14px; }
  .tool-chrome { padding: 10px 14px; gap: 10px; }
  .tool-chrome .url { font-size: 10.5px; padding: 5px 10px; }
  .tool-chrome .st { font-size: 0; gap: 0; }
  .tool-foot { padding: 16px 18px; }
  .tool-foot .acts { width: 100%; }
  .tool-foot .acts .btn { flex: 1 1 auto; justify-content: center; }
  .tool-preview .mask b { padding: 12px 20px; font-size: 14px; }
  body.page-calculator .tool-preview .mask { padding-bottom: 16px; }
}

/* ==========================================================================
   21. 计算工具更新公告（首页）
   数据源：/calc/api/announcements（SaaS 后端 announcements 表，与计算工具页同源）
   ========================================================================== */
.notice-sec { padding: 84px 0; background: var(--bg-soft); }
.notice-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 24px; flex-wrap: wrap; margin-bottom: 30px; }
.notice-more { display: inline-flex; align-items: center; gap: 8px; font-size: 14.5px; font-weight: 600; color: var(--blue-600); white-space: nowrap; }
.notice-more svg { width: 16px; height: 16px; transition: transform .2s ease; }
.notice-more:hover svg { transform: translateX(4px); }
.notice-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 16px; }
.notice-card {
  position: relative; background: var(--white); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 16px 20px; box-shadow: var(--shadow-sm);
  display: flex; gap: 16px; align-items: flex-start;
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.notice-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: #CFE1F7; }
.notice-card.is-pin::before {
  content: ''; position: absolute; left: 0; top: 20px; bottom: 20px; width: 3px;
  border-radius: 0 3px 3px 0; background: var(--orange-500);
}
.nc-top { display: flex; align-items: center; gap: 10px; margin-bottom: 11px; }
.nc-tag { display: inline-block; font-size: 12px; font-weight: 700; padding: 2px 10px; border-radius: 999px; letter-spacing: .3px; flex-shrink: 0; }
.nc-tag[data-tag="电价"] { color: #B45309; background: var(--orange-100); }
.nc-tag[data-tag="数据"] { color: #047857; background: #DCFCE7; }
.nc-tag[data-tag="更新"] { color: var(--blue-600); background: var(--blue-100); }
.nc-tag[data-tag="公告"] { color: #6D28D9; background: #EDE9FE; }
.nc-pin { font-size: 11.5px; font-weight: 700; color: #C2410C; flex-shrink: 0; }
.nc-date { font-size: 12.5px; color: var(--muted); margin-left: auto; white-space: nowrap; }
.nc-title { font-size: 15.5px; font-weight: 700; color: var(--ink); line-height: 1.6; }
.nc-text { margin-top: 10px; font-size: 13.5px; color: var(--text); line-height: 1.78; }
.notice-actions { display: flex; justify-content: center; margin-top: 26px; }
.notice-all-btn {
  padding: 11px 30px; border-radius: 999px; border: 1px solid var(--line);
  background: var(--white); color: var(--blue-600); font-size: 14px; font-weight: 600;
  cursor: pointer; transition: background .18s ease, border-color .18s ease, box-shadow .18s ease;
}
.notice-all-btn:hover { background: var(--blue-100); border-color: #BFD9F9; box-shadow: var(--shadow-sm); }
/* 骨架屏 */
.notice-skeleton { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 16px; }
.notice-skeleton .sk-card {
  height: 148px; border-radius: var(--radius); border: 1px solid var(--line);
  background: linear-gradient(100deg, #EEF3F9 30%, #F7FAFD 50%, #EEF3F9 70%);
  background-size: 220% 100%; animation: nc-shimmer 1.25s linear infinite;
}
@keyframes nc-shimmer { from { background-position: 130% 0; } to { background-position: -30% 0; } }
@media (prefers-reduced-motion: reduce) {
  .notice-skeleton .sk-card { animation: none; }
  .notice-card { transition: none; }
}
@media (max-width: 640px) {
  .notice-sec { padding: 56px 0; }
  .notice-head { margin-bottom: 22px; gap: 16px; }
  .notice-grid { grid-template-columns: 1fr; gap: 12px; }
  .notice-skeleton { grid-template-columns: 1fr; }
  .notice-card { padding: 16px 17px; }
  .notice-card:hover { transform: none; }
  .nc-title { font-size: 15px; }
  .nc-text { font-size: 13px; }
}

/* ===== 首页「计算工具更新公告」卡片配图（v2） ===== */
.nc-media {
  flex: none; width: 112px; aspect-ratio: 16 / 9; border-radius: 9px;
  overflow: hidden; background: var(--navy-800);
}
.nc-media img { width: 100%; height: 100%; object-fit: cover; display: block; }
.nc-body { flex: 1; min-width: 0; }
/* 首页只做摘要，正文限 4 行，避免单张卡片被长文撑高 */
.nc-text {
  display: -webkit-box; -webkit-line-clamp: 4; -webkit-box-orient: vertical;
  overflow: hidden;
}
@media (max-width: 640px) {
  .notice-card { gap: 13px; }
  .nc-media { width: 84px; border-radius: 7px; }
  .nc-text { -webkit-line-clamp: 3; }
}


/* ===== 算力板块 · 深色科技风（2026-10-19）===== */
#aiCenter { position: relative; background: #04121F; overflow: hidden; }
#aiCenter::before, #aiCenter::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(900px 420px at 18% 8%, rgba(61,139,255,.16), transparent 60%),
    radial-gradient(760px 400px at 86% 90%, rgba(18,185,129,.12), transparent 60%),
    radial-gradient(520px 320px at 55% 45%, rgba(255,122,24,.06), transparent 65%);
}
#aiCenter::after, #aiCenter::after {
  content: ""; position: absolute; inset: 0; pointer-events: none; opacity: .5;
  background-image:
    linear-gradient(rgba(61,139,255,.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(61,139,255,.055) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(760px 460px at 50% 0%, #000 20%, transparent 75%);
  -webkit-mask-image: radial-gradient(760px 460px at 50% 0%, #000 20%, transparent 75%);
}
#aiCenter .container, #aiCenter .container { position: relative; z-index: 1; }
#aiCenter .eyebrow, #aiCenter .eyebrow { color: #6FB3E4; }
#aiCenter .sec-title, #aiCenter .sec-title { color: #F2F6FB; }
#aiCenter .sec-sub, #aiCenter .sec-sub { color: #9DB4CC; }
#aiCenter .notice-more, #aiCenter .notice-more {
  color: #7FD0FF; border-color: rgba(127,208,255,.35);
}
#aiCenter .notice-more:hover, #aiCenter .notice-more:hover { background: rgba(61,139,255,.12); color: #fff; }

/* 首页算力卡：毛玻璃 + 发光描边 + 图标光晕 */
#aiCenter .biz-grid { gap: 20px; }
#aiCenter .biz-card, #aiCenter .biz-card {
  background: linear-gradient(160deg, rgba(16,48,82,.72), rgba(6,25,43,.88));
  border: 1px solid rgba(96,178,255,.28);
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  box-shadow: inset 0 1px 0 rgba(160,215,255,.14), 0 16px 40px rgba(0,6,16,.45);
}
#aiCenter .biz-card::after, #aiCenter .biz-card::after {
  background: linear-gradient(90deg, #3D8BFF, #12B981, #FF7A18);
}
#aiCenter .biz-card:hover, #aiCenter .biz-card:hover {
  transform: translateY(-6px);
  border-color: rgba(127,208,255,.6);
  box-shadow: inset 0 1px 0 rgba(160,215,255,.2), 0 0 0 1px rgba(61,139,255,.25),
              0 22px 60px rgba(0,10,24,.6), 0 0 34px rgba(61,139,255,.22);
}
#aiCenter .biz-icon, #aiCenter .biz-icon {
  background: linear-gradient(140deg, rgba(61,139,255,.22), rgba(61,139,255,.05));
  border: 1px solid rgba(96,178,255,.32);
  color: #7FD0FF;
  box-shadow: 0 0 22px rgba(61,139,255,.28), inset 0 0 14px rgba(61,139,255,.12);
}
#aiCenter .biz-card:hover .biz-icon, #aiCenter .biz-card:hover .biz-icon {
  background: linear-gradient(140deg, #1B6FE0, #1456B8); color: #fff;
  box-shadow: 0 0 30px rgba(61,139,255,.5);
}
#aiCenter .biz-card h3, #aiCenter .biz-card h3 { color: #EAF2FC; }
#aiCenter .biz-card p, #aiCenter .biz-card p { color: #A9C0D8; }
#aiCenter .biz-card p b, #aiCenter .biz-card p strong, #aiCenter .biz-card p b, #aiCenter .biz-card p strong { color: #7FD0FF; }

/* business 页算力板块（ess-c 型）val-card 同风格 */
#aiCenter .val-card {
  background: linear-gradient(160deg, rgba(16,48,82,.72), rgba(6,25,43,.88));
  border: 1px solid rgba(96,178,255,.28);
}
#aiCenter .val-card h4 { color: #EAF2FC; }
#aiCenter .val-card p { color: #A9C0D8; }
#aiCenter .ops-box { background: rgba(10,37,64,.6); border-color: rgba(96,178,255,.28); }
#aiCenter .ops-box__hd { color: #7FD0FF; }
#aiCenter .ops-box p { color: #A9C0D8; }
#aiCenter .ops-tags li { background: rgba(61,139,255,.14); color: #9FD0FF; border-color: rgba(96,178,255,.3); }
#aiCenter .numlist li { color: #C4D6E8; }
#aiCenter .numlist li::before { color: #7FD0FF; }
#aiCenter .prose { color: #B8CBDD; }
#aiCenter .prose p { color: #B8CBDD; }
#aiCenter .prose strong, #aiCenter .prose b { color: #EAF2FC; }
#aiCenter .biz-num { color: #6FB3E4; }
#aiCenter .ph-tag { color: #6B8DA8; }

@media (max-width: 720px) {
  #aiCenter .biz-grid { grid-template-columns: 1fr; }
}