/* ==========================================================================
   世慧科技官网 — 深海军蓝 × 品牌橙红渐变（呼应 logo 火焰花瓣）
   ========================================================================== */

:root {
  --navy-950: #060d16;
  --navy-900: #0b1f33;
  --navy-800: #102a44;
  --navy-700: #1a3a5c;
  --ink: #16222e;
  --gray-600: #5c6b7a;
  --gray-400: #9aa8b5;
  --line: #e6eaef;
  --paper: #ffffff;
  --mist: #f6f7f9;

  --orange-700: #c2572f;   /* 浅底文字色，保证可读性 */
  --orange-600: #ef7f57;
  --orange-500: #f59a76;
  --orange-400: #f9bda2;
  --amber: #f9c97e;
  --brand-rgb: 245, 154, 118;
  --grad-brand: linear-gradient(120deg, #ef7f57 0%, #f59a76 45%, #f9c97e 100%);

  --shadow-sm: 0 2px 10px rgba(11, 31, 51, .06);
  --shadow-md: 0 14px 40px rgba(11, 31, 51, .10);
  --shadow-lg: 0 30px 80px rgba(6, 13, 22, .18);

  --radius: 18px;
  --header-h: 76px;
  --container: 1200px;
  --ease: cubic-bezier(.22, .8, .3, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", -apple-system, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

.container { max-width: var(--container); margin: 0 auto; padding: 0 32px; }

/* ---------- 通用文字 ---------- */
.grad-text {
  background: var(--grad-brand);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.section { padding: 120px 0; }
.section-eyebrow {
  font-size: 13px;
  letter-spacing: .22em;
  color: var(--orange-700);
  font-weight: 600;
  margin-bottom: 18px;
}
.section-title {
  font-size: clamp(30px, 4vw, 44px);
  line-height: 1.28;
  font-weight: 700;
  letter-spacing: .01em;
  margin-bottom: 22px;
}
.section-desc {
  color: var(--gray-600);
  font-size: 17px;
  max-width: 640px;
}
.section-head { margin-bottom: 64px; }
.section-head.center { text-align: center; }
.section-head.center .section-desc { margin: 0 auto; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 15px 30px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .04em;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), background .3s, color .3s, border-color .3s;
}
.btn svg { width: 17px; height: 17px; }
.btn-primary {
  background: var(--grad-brand);
  color: #fff;
  box-shadow: 0 10px 26px rgba(var(--brand-rgb), .32);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 34px rgba(var(--brand-rgb), .4); }
.btn-ghost {
  color: #fff;
  border: 1px solid rgba(255, 255, 255, .38);
  backdrop-filter: blur(6px);
}
.btn-ghost:hover { border-color: #fff; background: rgba(255, 255, 255, .1); }
.btn-outline {
  color: var(--orange-700);
  border: 1.5px solid rgba(var(--brand-rgb), .45);
  padding: 12px 26px;
}
.btn-outline:hover { background: var(--orange-500); color: #fff; transform: translateY(-2px); }
.btn-sm { padding: 10px 22px; font-size: 14px; }
.btn-block { width: 100%; justify-content: center; }

/* ==========================================================================
   顶部导航
   ========================================================================== */
.site-header {
  position: relative;   /* 随页面滚动，不悬浮遮挡 */
  z-index: 1000;
  height: var(--header-h);
  display: flex;
  align-items: center;
  background: var(--navy-950);
  border-bottom: 1px solid rgba(255, 255, 255, .07);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; width: 100%; }

.brand { display: flex; align-items: center; gap: 13px; }
.brand-logo {
  width: 46px; height: 46px;
  object-fit: cover;
  border-radius: 10px;
  background: #fff;
  box-shadow: var(--shadow-sm);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.25; }
.brand-text strong { font-size: 18px; letter-spacing: .12em; color: #fff; transition: color .4s; }
.brand-text em {
  font-style: normal; font-size: 10px; letter-spacing: .2em;
  color: rgba(255, 255, 255, .62); transition: color .4s;
}

.main-nav { display: flex; align-items: center; gap: 34px; }
.nav-link {
  position: relative;
  font-size: 15px;
  font-weight: 500;
  color: rgba(255, 255, 255, .85);
  letter-spacing: .06em;
  padding: 6px 0;
  transition: color .3s;
}
.nav-link::after {
  content: "";
  position: absolute; left: 0; bottom: -2px;
  width: 0; height: 2px; border-radius: 2px;
  background: var(--grad-brand);
  transition: width .35s var(--ease);
}
.nav-link:hover, .nav-link.active { color: var(--orange-400); }
.nav-link:hover::after, .nav-link.active::after { width: 100%; }

.menu-toggle { display: none; flex-direction: column; gap: 5px; padding: 8px; z-index: 1002; }
.menu-toggle span {
  width: 24px; height: 2px; background: #fff; border-radius: 2px;
  transition: transform .3s, opacity .3s, background .3s;
}
.menu-toggle.open span { background: #fff; }
.menu-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle.open span:nth-child(2) { opacity: 0; }
.menu-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ==========================================================================
   首屏
   ========================================================================== */
.hero {
  position: relative;
  min-height: calc(100svh - var(--header-h));
  display: flex;
  align-items: center;
  color: #fff;
  overflow: hidden;
}
.hero-bg { position: absolute; inset: 0; }
.hero-bg img { width: 100%; height: 100%; object-fit: cover; }
.hero-overlay {
  position: absolute; inset: 0;
  z-index: 2;
  pointer-events: none;
  background:
    /* 顶部轻压暗以衬托导航；底部极淡渐变过渡到下方内容区，避开视频口播字幕 */
    linear-gradient(180deg, rgba(6, 13, 22, .30) 0%, transparent 14%, transparent 82%, rgba(6, 13, 22, .34) 100%),
    /* 四周轻微暗角，增加电影感 */
    radial-gradient(118% 78% at 50% 48%, transparent 62%, rgba(6, 13, 22, .26) 100%);
}
/* 底部留出 16vh，使网站文字避开视频内的字幕/标注区 */
.hero-content { position: relative; z-index: 2; width: 100%; padding: 56px 0 16vh; }
.hero-eyebrow {
  display: inline-block;
  font-size: 13px;
  letter-spacing: .18em;
  color: rgba(255, 255, 255, .82);
  border: 1px solid rgba(255, 255, 255, .28);
  border-radius: 999px;
  padding: 9px 22px;
  margin-bottom: 34px;
  backdrop-filter: blur(6px);
  background: rgba(255, 255, 255, .06);
}
.hero-title {
  font-size: clamp(38px, 6.2vw, 74px);
  line-height: 1.22;
  font-weight: 700;
  letter-spacing: .02em;
  margin-bottom: 28px;
  text-wrap: balance;
}
.hero-sub {
  max-width: 640px;
  font-size: 17px;
  color: rgba(255, 255, 255, .82);
  margin-bottom: 44px;
}
.hero-actions { display: flex; gap: 18px; flex-wrap: wrap; margin-bottom: 76px; }

/* ---------------- 视频区滚动提示 ---------------- */
.scroll-cue {
  position: absolute; left: 50%; bottom: 26px;
  transform: translateX(-50%);
  z-index: 3;
  display: flex; flex-direction: column; align-items: center; gap: 10px;
  color: rgba(255, 255, 255, .88);
  text-decoration: none;
  text-shadow: 0 2px 14px rgba(0, 0, 0, .55);
  animation: cueBob 2.6s ease-in-out infinite;
}
.scroll-cue-text { font-size: 12px; letter-spacing: .24em; white-space: nowrap; }
.scroll-cue-arrow { width: 22px; height: 22px; opacity: .9; }
@keyframes cueBob {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%      { transform: translateX(-50%) translateY(7px); }
}
@media (prefers-reduced-motion: reduce) { .scroll-cue { animation: none; } }

/* ---------------- 影片引题（视频顶部居中） ---------------- */
.hero-lead {
  position: absolute;
  left: 50%;
  top: clamp(30px, 6vh, 66px);
  transform: translateX(-50%);
  z-index: 3;
  margin: 0;
  color: rgba(255, 255, 255, .96);
  font-size: clamp(15px, 1.9vw, 21px);
  font-weight: 500;
  letter-spacing: .22em;
  white-space: nowrap;
  text-shadow: 0 2px 20px rgba(0, 0, 0, .5);
  pointer-events: none;
}
.hero-lead::after {
  content: "";
  display: block;
  width: 52px;
  height: 2px;
  margin: 16px auto 0;
  border-radius: 2px;
  background: var(--grad-brand);
}
@media (max-width: 520px) {
  .hero-lead { letter-spacing: .16em; }
}

/* ---------------- 视频声音开关（右下角） ---------------- */
.video-sound {
  position: absolute; right: 30px; bottom: 30px;
  z-index: 4;
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 18px 10px 14px;
  border: 1px solid rgba(255, 255, 255, .3);
  border-radius: 999px;
  background: rgba(6, 13, 22, .45);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: rgba(255, 255, 255, .92);
  font-size: 12.5px; letter-spacing: .12em; white-space: nowrap;
  cursor: pointer;
  box-shadow: 0 6px 22px rgba(0, 0, 0, .28);
  transition: background .3s var(--ease), border-color .3s var(--ease), color .3s var(--ease);
}
.video-sound:hover { background: rgba(6, 13, 22, .68); border-color: rgba(255, 255, 255, .5); }
.video-sound:focus-visible { outline: 2px solid var(--orange-400); outline-offset: 3px; }
.video-sound .vs-icon { width: 18px; height: 18px; flex: none; }
.video-sound .vs-icon-on { display: none; }
.video-sound.on { border-color: var(--orange-400); color: var(--orange-400); }
.video-sound.on .vs-icon-on { display: block; }
.video-sound.on .vs-icon-off { display: none; }
@media (max-width: 700px) {
  .video-sound { right: 16px; bottom: 16px; padding: 8px 14px 8px 11px; font-size: 11.5px; }
  .video-sound .vs-text { display: none; }
  .video-sound { padding: 9px; }
}

/* ---------------- 首页内容·欢迎区（视频下方独立区域，需滚动可见） ---------------- */
.hero-intro {
  position: relative;
  background: var(--navy-950);
  color: #fff;
  text-align: center;
  padding: clamp(74px, 12vh, 138px) 32px clamp(64px, 9vh, 108px);
  overflow: hidden;
}
.hero-intro::before {
  content: "";
  position: absolute; inset: 0;
  background:
    radial-gradient(60% 50% at 50% 0%, rgba(239, 127, 87, .10), transparent 70%),
    radial-gradient(80% 60% at 50% 100%, rgba(11, 31, 51, .8), transparent 75%);
  pointer-events: none;
}
.hero-intro .container { position: relative; z-index: 1; }
.hero-intro .hero-eyebrow { margin-bottom: 34px; }
.hero-intro .hero-title { margin: 0 auto 28px; }
.hero-intro .hero-sub { margin: 0 auto 44px; }
.hero-intro .hero-actions { justify-content: center; margin-bottom: 0; }
.hero-stats {
  display: flex;
  gap: clamp(28px, 5vw, 72px);
  flex-wrap: wrap;
  padding-top: 36px;
  border-top: 1px solid rgba(255, 255, 255, .18);
  max-width: 860px;
}
.stat { display: flex; flex-direction: column; gap: 4px; }
.stat-num {
  font-size: clamp(26px, 3.2vw, 38px);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  background: linear-gradient(120deg, #ffd9b8, #f9c97e);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.stat-label { font-size: 13px; color: rgba(255, 255, 255, .66); letter-spacing: .1em; }


/* ==========================================================================
   客户墙
   ========================================================================== */
.clients { background: var(--navy-950); padding: 54px 0; overflow: hidden; }
.clients-title {
  text-align: center;
  font-size: 13px;
  letter-spacing: .3em;
  color: rgba(255, 255, 255, .45);
  margin-bottom: 30px;
}
.clients-marquee {
  overflow: hidden;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
}
.clients-track {
  display: flex;
  gap: 64px;
  width: max-content;
  animation: marquee 42s linear infinite;
}
.clients-track span {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: .12em;
  color: rgba(255, 255, 255, .58);
  white-space: nowrap;
  transition: color .3s;
}
.clients-track span:hover { color: var(--orange-400); }
@keyframes marquee { to { transform: translateX(-50%); } }

/* ==========================================================================
   公司介绍
   ========================================================================== */
.about { background: var(--paper); }
.about-grid {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: clamp(48px, 6vw, 96px);
  align-items: start;
}
.about-text p { color: var(--gray-600); font-size: 16px; margin-bottom: 20px; }
.about-text strong { color: var(--ink); }
.about-points { list-style: none; margin-top: 34px; display: flex; flex-direction: column; gap: 20px; }
.about-points li { display: flex; gap: 16px; align-items: flex-start; }
.about-points .dot {
  flex: none;
  width: 10px; height: 10px;
  margin-top: 9px;
  border-radius: 50%;
  background: var(--grad-brand);
  box-shadow: 0 0 0 5px rgba(var(--brand-rgb), .12);
}
.about-points strong { display: block; font-size: 16px; }
.about-points span { color: var(--gray-600); font-size: 14.5px; }

.about-media { display: flex; flex-direction: column; gap: 26px; position: sticky; top: 40px; }
.media-card {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  position: relative;
}
.media-card img { width: 100%; height: 340px; object-fit: cover; transition: transform .8s var(--ease); }
.media-card:hover img { transform: scale(1.04); }
.media-caption {
  position: absolute; left: 18px; bottom: 16px;
  background: rgba(6, 13, 22, .62);
  backdrop-filter: blur(8px);
  color: #fff;
  font-size: 13px;
  letter-spacing: .08em;
  padding: 8px 16px;
  border-radius: 999px;
}
.honor-card {
  background: var(--navy-900);
  color: #fff;
  border-radius: var(--radius);
  padding: 34px 32px;
  box-shadow: var(--shadow-md);
}
.honor-card h3 { font-size: 18px; margin-bottom: 20px; letter-spacing: .1em; }
.honor-tags { display: flex; flex-wrap: wrap; gap: 10px; }
.honor-tags span {
  font-size: 12.5px;
  padding: 8px 14px;
  border-radius: 8px;
  background: rgba(255, 255, 255, .07);
  border: 1px solid rgba(255, 255, 255, .12);
  color: rgba(255, 255, 255, .85);
  letter-spacing: .04em;
  transition: background .3s, border-color .3s;
}
.honor-tags span:hover { background: rgba(var(--brand-rgb), .22); border-color: rgba(var(--brand-rgb), .5); }

/* ==========================================================================
   产品展示
   ========================================================================== */
.products { background: var(--mist); }
.product-feature {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  border-radius: 24px;
  overflow: hidden;
  background: var(--navy-900);
  color: #fff;
  box-shadow: var(--shadow-lg);
  margin-bottom: 40px;
}
.pf-media { position: relative; min-height: 420px; }
.pf-media img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.pf-media::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(90deg, transparent 55%, rgba(11, 31, 51, .55) 100%);
}
.pf-body { padding: clamp(36px, 4vw, 64px); }
.pf-badge {
  display: inline-block;
  font-size: 12px;
  letter-spacing: .2em;
  color: #fff;
  background: var(--grad-brand);
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 22px;
}
.pf-body h3 { font-size: clamp(24px, 2.6vw, 32px); margin-bottom: 18px; }
.pf-body > p { color: rgba(255, 255, 255, .78); font-size: 15.5px; margin-bottom: 26px; }
.pf-list { list-style: none; display: grid; grid-template-columns: 1fr 1fr; gap: 14px 22px; margin-bottom: 36px; }
.pf-list li {
  position: relative;
  padding-left: 24px;
  font-size: 14px;
  color: rgba(255, 255, 255, .88);
}
.pf-list li::before {
  content: "";
  position: absolute; left: 0; top: .58em;
  width: 9px; height: 9px;
  border-radius: 2px;
  background: var(--grad-brand);
  transform: rotate(45deg);
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
/* 仅剩一个产品卡时居中显示，避免左侧留出大片空白 */
.product-grid--single {
  grid-template-columns: minmax(0, 620px);
  justify-content: center;
}
.product-card {
  background: var(--paper);
  border-radius: var(--radius);
  padding: 40px 34px;
  border: 1px solid transparent;
  box-shadow: var(--shadow-sm);
  transition: transform .45s var(--ease), box-shadow .45s var(--ease), border-color .45s;
  display: flex;
  flex-direction: column;
}
.product-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-md);
  border-color: rgba(var(--brand-rgb), .22);
}
.pc-icon {
  width: 58px; height: 58px;
  border-radius: 16px;
  display: grid; place-items: center;
  background: linear-gradient(140deg, rgba(var(--brand-rgb), .12), rgba(249, 201, 126, .16));
  color: var(--orange-700);
  margin-bottom: 24px;
}
.pc-icon svg { width: 28px; height: 28px; }
.product-card h3 { font-size: 19px; margin-bottom: 12px; letter-spacing: .02em; }
.product-card p { color: var(--gray-600); font-size: 14.5px; flex: 1; }
.pc-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 22px; }
.pc-tags span {
  font-size: 12px;
  color: var(--gray-600);
  background: var(--mist);
  padding: 5px 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
}

/* ==========================================================================
   互动演示
   ========================================================================== */
/* ---------------- 互动演示：通透玻璃质感 ---------------- */
.demo {
  position: relative;
  color: #fff;
  overflow: hidden;
  isolation: isolate;
  background: var(--navy-950); /* 图片未加载时的兜底底色 */
}
.demo-bg { position: absolute; inset: 0; z-index: -1; }
.demo-bg img { width: 100%; height: 100%; object-fit: cover; }
.demo-bg-veil {
  position: absolute; inset: 0;
  background:
    linear-gradient(180deg, rgba(6, 13, 22, .86) 0%, rgba(11, 31, 51, .74) 45%, rgba(6, 13, 22, .9) 100%),
    radial-gradient(60% 70% at 80% 20%, rgba(245, 154, 118, .14), transparent 62%);
  backdrop-filter: blur(3px);
}
.demo-bg-grid {
  position: absolute; inset: 0;
  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: 68px 68px;
  -webkit-mask-image: radial-gradient(80% 70% at 50% 40%, #000 20%, transparent 85%);
  mask-image: radial-gradient(80% 70% at 50% 40%, #000 20%, transparent 85%);
}
.demo-inner { position: relative; }
.demo .section-eyebrow { color: var(--orange-400); }
.demo .section-title { color: #fff; }
.demo .section-desc { color: rgba(255, 255, 255, .66); }

/* 通用玻璃容器 */
.glass {
  background: rgba(255, 255, 255, .055);
  backdrop-filter: blur(26px) saturate(150%);
  -webkit-backdrop-filter: blur(26px) saturate(150%);
  border: 1px solid rgba(255, 255, 255, .16);
  box-shadow:
    0 26px 70px rgba(3, 9, 16, .38),
    inset 0 1px 0 rgba(255, 255, 255, .16),
    inset 0 -1px 0 rgba(255, 255, 255, .05);
}

.demo-stage {
  display: grid;
  grid-template-columns: 1fr 420px;
  gap: clamp(28px, 4vw, 64px);
  align-items: stretch;
}
/* 无右侧信息面板时：单列居中 */
.demo-stage--solo {
  grid-template-columns: minmax(0, 1fr);
  max-width: 720px;
  margin: 0 auto;
}

/* 核心数据条带：独立于首屏视频之外，避免与视频内文字重叠 */
.stat-band {
  background: var(--navy-950);
  border-top: 1px solid rgba(255, 255, 255, .07);
  border-bottom: 1px solid rgba(255, 255, 255, .07);
}
.stat-band-inner {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(28px, 5vw, 72px);
  justify-content: space-between;
  padding: 34px 32px;
}
.stat-band .stat { flex: 1 1 120px; }

/* ---------------- 风机互动演示 ---------------- */
.turbine-stage {
  --accent: #7fd4ff;
  --accent-rgb: 127, 212, 255;
  position: relative;
  border-radius: 26px;
  overflow: hidden;
  min-height: 660px;
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(14px) saturate(130%);
  -webkit-backdrop-filter: blur(14px) saturate(130%);
}
.ts-atmos {
  position: absolute; inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(58% 40% at 50% 12%, rgba(var(--accent-rgb), .16), transparent 68%),
    radial-gradient(80% 42% at 50% 100%, rgba(79, 140, 196, .22), transparent 72%),
    linear-gradient(180deg, rgba(6, 13, 22, .5), transparent 40%, rgba(6, 13, 22, .55));
}

/* 远景风场 + 风的流线 */
.ts-sky { position: absolute; inset: 0; width: 100%; height: 100%; z-index: 1; pointer-events: none; }
.far-body { fill: rgba(226, 238, 250, .1); stroke: rgba(226, 238, 250, .16); stroke-width: 2; }
.far-rotor { animation: spin 16s linear infinite; }
.far-rotor.r2 { animation-duration: 21s; }
.far-rotor.r3 { animation-duration: 26s; }
.wind-streaks .ws {
  fill: none;
  stroke: rgba(255, 255, 255, .22);
  stroke-width: 1.4;
  stroke-linecap: round;
  stroke-dasharray: 34 210;
  animation: windFlow calc(6.5s / max(var(--wind, 8), 1.5) * 4) linear infinite;
}
.wind-streaks .w2 { animation-delay: -1.2s; opacity: .7; }
.wind-streaks .w3 { animation-delay: -2.4s; opacity: .85; }
.wind-streaks .w4 { animation-delay: -.6s; opacity: .6; }
.wind-streaks .w5 { animation-delay: -3.1s; opacity: .75; }
.wind-streaks .w6 { animation-delay: -1.8s; opacity: .55; }
@keyframes windFlow { to { stroke-dashoffset: -488; } }

/* 主体风机 */
.ts-frame {
  position: relative;
  z-index: 2;
  height: 100%;
  aspect-ratio: 560 / 660;
  margin: 0 auto;
  padding: 18px 0;
  box-sizing: border-box;
}
.ts-turbine { position: absolute; inset: 18px 0; width: 100%; height: calc(100% - 36px); }

/* 部件高亮环 */
.hl-ring {
  fill: rgba(var(--accent-rgb), .07);
  stroke: rgba(var(--accent-rgb), .55);
  stroke-width: 1.4;
  stroke-dasharray: 5 6;
  opacity: 0;
  transition: opacity .4s var(--ease);
}
[data-part-group].lit .hl-ring {
  opacity: 1;
  animation: hlDash 12s linear infinite, hlGlow 2.6s ease-in-out infinite;
}
@keyframes hlDash { to { stroke-dashoffset: -110; } }
@keyframes hlGlow {
  0%, 100% { stroke-opacity: .45; }
  50% { stroke-opacity: .95; }
}
[data-part-group].lit { filter: drop-shadow(0 0 10px rgba(var(--accent-rgb), .55)); }

/* 数据环 + 扫描线 */
.ts-ring { animation: spin 30s linear infinite; }
.ts-ring.rev { animation-duration: 19s; animation-direction: reverse; }
@keyframes spin { to { transform: rotate(360deg); } }
.ts-sweep { animation: sweepDown 6.5s ease-in-out infinite; }
@keyframes sweepDown {
  0% { transform: translateY(270px); opacity: 0; }
  12% { opacity: 1; }
  88% { opacity: 1; }
  100% { transform: translateY(600px); opacity: 0; }
}
#rotor { animation: spin var(--spin, 7s) linear infinite; }

/* 热点 */
.hotspot {
  position: absolute;
  transform: translate(-50%, -50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 9px;
  z-index: 5;
  color: #fff;
}
.hs-dot {
  width: 15px; height: 15px;
  border-radius: 50%;
  background: var(--grad-brand);
  border: 2.5px solid rgba(255, 255, 255, .92);
  box-shadow: 0 0 0 0 rgba(var(--brand-rgb), .6);
  animation: hsPulse 2.4s infinite;
  transition: transform .3s var(--ease);
}
@keyframes hsPulse {
  0% { box-shadow: 0 0 0 0 rgba(var(--brand-rgb), .6); }
  70% { box-shadow: 0 0 0 18px rgba(var(--brand-rgb), 0); }
  100% { box-shadow: 0 0 0 0 rgba(var(--brand-rgb), 0); }
}
.hs-label {
  font-size: 12px;
  letter-spacing: .08em;
  padding: 5px 13px;
  border-radius: 999px;
  white-space: nowrap;
  background: rgba(10, 22, 36, .42);
  border: 1px solid rgba(255, 255, 255, .24);
  backdrop-filter: blur(10px) saturate(140%);
  -webkit-backdrop-filter: blur(10px) saturate(140%);
  color: rgba(255, 255, 255, .92);
  box-shadow: 0 6px 18px rgba(0, 0, 0, .28);
  transition: background .3s, border-color .3s, color .3s, transform .3s var(--ease);
}
.hotspot:hover .hs-dot { transform: scale(1.4); }
.hotspot:hover .hs-label { transform: translateY(-3px); border-color: rgba(255, 255, 255, .5); }
.hotspot.active .hs-dot {
  animation: none;
  background: #fff;
  border-color: var(--orange-500);
  box-shadow: 0 0 0 6px rgba(var(--brand-rgb), .22);
}
.hotspot.active .hs-label {
  background: var(--grad-brand);
  border-color: transparent;
  color: #fff;
  font-weight: 600;
}

.ts-hint {
  position: absolute;
  left: 24px; bottom: 22px;
  z-index: 3;
  font-size: 12.5px;
  letter-spacing: .06em;
  color: rgba(255, 255, 255, .48);
}

/* SVG 设施模型通用配色（主色驱动） */
/* SVG 设施模型通用配色（场景主色驱动） */
.fx-body { fill: rgba(219, 233, 247, .24); stroke: rgba(234, 243, 255, .66); stroke-width: 1.3; }
.fx-blade { fill: rgba(230, 241, 251, .3); stroke: rgba(234, 243, 255, .72); stroke-width: 1.2; }
.fx-line { fill: none; stroke: rgba(234, 243, 255, .6); stroke-width: 1.4; }
.fx-dim { fill: rgba(219, 233, 247, .12); stroke: rgba(234, 243, 255, .34); stroke-width: 1.2; }
.fx-accent { fill: var(--accent); }
.fx-accent-stroke { fill: none; stroke: var(--accent); stroke-width: 1.5; }
.fx-txt { fill: rgba(255, 255, 255, .7); font-size: 12px; letter-spacing: .04em; }

/* 场景内动效 */
.blades { animation: spin 7s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.fx-pulse { transform-box: fill-box; transform-origin: center; animation: pulseDot 2.8s ease-in-out infinite; }
@keyframes pulseDot {
  0%, 100% { opacity: .35; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.6); }
}
.fx-drop { stroke-dasharray: 3 5; animation: dropFall 1.4s linear infinite; }
.fx-drop.d2 { animation-delay: .45s; }
.fx-drop.d3 { animation-delay: .9s; }
@keyframes dropFall { to { stroke-dashoffset: -16; } }
.fx-ring { animation: ringFade 2.4s ease-out infinite; }
.fx-ring.r2 { animation-delay: .5s; }
.fx-ring.r3 { animation-delay: 1s; }
@keyframes ringFade {
  0% { opacity: .15; }
  50% { opacity: .9; }
  100% { opacity: .15; }
}
.fx-steam { animation: steamRise 5s ease-in-out infinite; }
@keyframes steamRise {
  0% { opacity: .25; transform: translateY(6px) scale(.92); }
  50% { opacity: .9; transform: translateY(-6px) scale(1.04); }
  100% { opacity: .25; transform: translateY(6px) scale(.92); }
}
.fx-smoke { animation: steamRise 6.4s ease-in-out infinite; }
.fx-flow { stroke-dasharray: 6 8; animation: flowDown 1.6s linear infinite; }
.fx-flow.f2 { animation-duration: 1.9s; }
.fx-flow.f3 { animation-duration: 2.2s; }
@keyframes flowDown { to { stroke-dashoffset: -28; } }
.fx-blink { animation: blink 1.8s steps(1, end) infinite; }
.fx-blink.f2 { animation-delay: .5s; }
.fx-blink.f3 { animation-delay: 1s; }
@keyframes blink { 0%, 60% { opacity: 1; } 61%, 100% { opacity: .25; } }

/* 视角控制 */
.scene-controls {
  position: absolute;
  right: 20px; bottom: 20px;
  display: flex; gap: 10px;
  z-index: 3;
}
.sc-btn {
  width: 42px; height: 42px;
  border-radius: 12px;
  display: grid; place-items: center;
  color: rgba(255, 255, 255, .82);
  background: rgba(10, 22, 36, .38);
  border: 1px solid rgba(255, 255, 255, .22);
  backdrop-filter: blur(12px) saturate(140%);
  -webkit-backdrop-filter: blur(12px) saturate(140%);
  transition: background .3s, color .3s, border-color .3s, transform .3s var(--ease);
}
.sc-btn svg { width: 18px; height: 18px; }
.sc-btn:hover {
  background: rgba(255, 255, 255, .14);
  border-color: rgba(255, 255, 255, .4);
  transform: translateY(-2px);
}
.sc-btn.wide {
  width: auto;
  grid-auto-flow: column;
  gap: 8px;
  padding: 0 16px;
  font-size: 13px;
  letter-spacing: .08em;
}
.sc-btn.wide[aria-pressed="true"] {
  color: #1c1006;
  background: linear-gradient(120deg, #f9c97e, #f59a76);
  border-color: transparent;
}
.scene-hint {
  position: absolute;
  left: 22px; bottom: 24px;
  z-index: 3;
  font-size: 12.5px;
  letter-spacing: .06em;
  color: rgba(255, 255, 255, .5);
}

/* 信息面板 */
.demo-panel {
  display: flex;
  flex-direction: column;
  gap: 20px;
  background: rgba(255, 255, 255, .05);
  border: 1px solid rgba(255, 255, 255, .16);
  border-radius: 24px;
  padding: 32px 30px;
  backdrop-filter: blur(24px) saturate(150%);
  -webkit-backdrop-filter: blur(24px) saturate(150%);
}
.dp-badge {
  display: inline-block;
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--amber);
  border: 1px solid rgba(247, 168, 35, .4);
  padding: 5px 14px;
  border-radius: 999px;
  margin-bottom: 16px;
}
.dp-head h3 { font-size: 24px; margin-bottom: 8px; }
.dp-head p { color: rgba(255, 255, 255, .6); font-size: 14px; margin-bottom: 20px; }
.dp-points { list-style: none; display: flex; flex-direction: column; gap: 12px; margin-bottom: 6px; }
.dp-points li {
  position: relative;
  padding-left: 22px;
  font-size: 13.5px;
  color: rgba(255, 255, 255, .82);
  line-height: 1.65;
}
.dp-points li::before {
  content: "";
  position: absolute; left: 0; top: .5em;
  width: 8px; height: 8px;
  border-radius: 2px;
  background: var(--grad-brand);
  transform: rotate(45deg);
}

.dp-live {
  background: rgba(255, 255, 255, .045);
  border: 1px solid rgba(255, 255, 255, .12);
  border-radius: 16px;
  padding: 20px;
}
.dp-live-title {
  display: flex; align-items: center; gap: 10px;
  font-size: 13px; letter-spacing: .12em;
  color: rgba(255, 255, 255, .72);
  margin-bottom: 16px;
}
.dp-wind { margin-left: auto; color: var(--amber); font-variant-numeric: tabular-nums; letter-spacing: .04em; }
.live-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: #38d47a;
  animation: liveBlink 1.6s infinite;
}
@keyframes liveBlink { 50% { opacity: .3; } }
.dp-live-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 16px; }
.live-item {
  background: rgba(255, 255, 255, .05);
  border-radius: 10px;
  padding: 10px 14px;
  display: flex; flex-direction: column; gap: 2px;
}
.live-label { font-size: 11px; color: rgba(255, 255, 255, .5); letter-spacing: .08em; }
.live-value { font-size: 16px; font-weight: 600; font-variant-numeric: tabular-nums; }
.live-value.ok { color: #38d47a; }
.live-value.warn { color: var(--amber); }
.wave-box {
  border-radius: 10px;
  overflow: hidden;
  background: rgba(255, 255, 255, .04);
}
#waveCanvas { width: 100%; display: block; }

.dp-wind-control { margin-top: auto; }
.dp-wind-control label {
  font-size: 12px; letter-spacing: .16em;
  color: rgba(255, 255, 255, .6);
  display: block; margin-bottom: 10px;
}
#windSlider {
  width: 100%;
  appearance: none;
  height: 6px;
  border-radius: 3px;
  background: linear-gradient(90deg, #4a90c2, var(--orange-500) 65%, var(--orange-600));
  outline: none;
}
#windSlider::-webkit-slider-thumb {
  appearance: none;
  width: 20px; height: 20px;
  border-radius: 50%;
  background: #fff;
  border: 4px solid var(--orange-500);
  box-shadow: 0 2px 10px rgba(0, 0, 0, .4);
  cursor: grab;
}
#windSlider::-moz-range-thumb {
  width: 20px; height: 20px;
  border-radius: 50%;
  background: #fff;
  border: 4px solid var(--orange-500);
  cursor: grab;
}
.wind-scale {
  display: flex; justify-content: space-between;
  font-size: 11px; color: rgba(255, 255, 255, .4);
  margin-top: 8px;
}

/* 监测闭环 */
.closed-loop {
  margin-top: 56px;
  display: flex;
  align-items: stretch;
  gap: 0;
  background: rgba(255, 255, 255, .05);
  border: 1px solid rgba(255, 255, 255, .16);
  border-radius: 20px;
  padding: 30px clamp(18px, 3vw, 44px);
  flex-wrap: wrap;
  backdrop-filter: blur(22px) saturate(140%);
  -webkit-backdrop-filter: blur(22px) saturate(140%);
  box-shadow: 0 24px 60px rgba(3, 9, 16, .32), inset 0 1px 0 rgba(255, 255, 255, .12);
}
.loop-step {
  flex: 1 1 150px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 6px 14px;
  min-width: 150px;
}
.loop-num {
  font-size: 12px;
  font-weight: 700;
  color: var(--orange-400);
  letter-spacing: .18em;
}
.loop-step strong { font-size: 16.5px; letter-spacing: .06em; }
.loop-step span:last-child { font-size: 12.5px; color: rgba(255, 255, 255, .55); }
.loop-arrow {
  align-self: center;
  width: 30px; height: 2px;
  background: linear-gradient(90deg, rgba(var(--brand-rgb), .1), var(--orange-500));
  position: relative;
  flex: none;
}
.loop-arrow::after {
  content: "";
  position: absolute; right: -1px; top: -3.5px;
  border-left: 8px solid var(--orange-500);
  border-top: 4.5px solid transparent;
  border-bottom: 4.5px solid transparent;
}

/* ==========================================================================
   新闻动态
   ========================================================================== */
.news { background: var(--paper); }
.news-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
}

/* 轮播 */
.nc-viewport { overflow: hidden; padding: 6px 2px 10px; }
.nc-track {
  display: flex;
  gap: 28px;
  transition: transform .7s var(--ease);
  will-change: transform;
}
.news-card {
  flex: 0 0 calc((100% - 28px) / 2);
  display: flex;
  gap: 28px;
  padding: 36px 34px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  transition: transform .4s var(--ease), box-shadow .4s var(--ease), border-color .4s;
}
.news-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: rgba(var(--brand-rgb), .34);
}

.nc-controls { display: flex; align-items: center; gap: 16px; }
.nc-btn {
  width: 46px; height: 46px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: var(--paper);
  display: grid; place-items: center;
  color: var(--navy-900);
  transition: background .3s, color .3s, border-color .3s, transform .3s var(--ease), box-shadow .3s;
}
.nc-btn svg { width: 20px; height: 20px; }
.nc-btn:hover {
  background: var(--navy-900);
  border-color: var(--navy-900);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}
.nc-dots { display: flex; align-items: center; gap: 9px; }
.nc-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--line);
  transition: width .35s var(--ease), background .35s;
}
.nc-dot.active { width: 26px; border-radius: 4px; background: var(--orange-600); }

.news-body { display: flex; flex-direction: column; }
.news-tag {
  align-self: flex-start;
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--orange-700);
  background: rgba(var(--brand-rgb), .08);
  padding: 4px 12px;
  border-radius: 999px;
  margin-bottom: 12px;
}
.news-body h3 { font-size: 17.5px; line-height: 1.5; margin-bottom: 10px; }
.news-body p {
  font-size: 14px;
  color: var(--gray-600);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ==========================================================================
   联系我们
   ========================================================================== */
.contact {
  background:
    radial-gradient(60% 80% at 0% 100%, rgba(var(--brand-rgb), .06), transparent 60%),
    var(--mist);
}
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(48px, 6vw, 90px);
  align-items: start;
}
.contact-info > p { color: var(--gray-600); margin-bottom: 24px; max-width: 460px; }
.contact-cta {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 34px;
}
.cc-note { font-size: 12.5px; color: var(--gray-600); letter-spacing: .04em; }
.contact-cards { display: flex; flex-direction: column; gap: 16px; }
.contact-card {
  display: flex;
  align-items: center;
  gap: 18px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 20px 24px;
  transition: transform .35s var(--ease), box-shadow .35s var(--ease);
}
.contact-card:hover { transform: translateX(6px); box-shadow: var(--shadow-sm); }
.cc-icon {
  flex: none;
  width: 48px; height: 48px;
  border-radius: 13px;
  display: grid; place-items: center;
  background: linear-gradient(140deg, rgba(var(--brand-rgb), .12), rgba(249, 201, 126, .16));
  color: var(--orange-500);
}
.cc-icon svg { width: 22px; height: 22px; }
.cc-label { display: block; font-size: 12px; color: var(--gray-600); letter-spacing: .08em; }
.cc-value { font-size: 16.5px; font-weight: 600; color: var(--navy-900); }
a.cc-value:hover { color: var(--orange-500); }

.contact-form {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: clamp(30px, 3.4vw, 46px);
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form-field { display: flex; flex-direction: column; gap: 8px; }
.form-field label { font-size: 13px; font-weight: 600; letter-spacing: .05em; color: var(--navy-900); }
.form-field input, .form-field select, .form-field textarea {
  font-family: inherit;
  font-size: 14.5px;
  color: var(--ink);
  border: 1.5px solid var(--line);
  border-radius: 10px;
  padding: 13px 16px;
  background: var(--paper);
  outline: none;
  transition: border-color .3s, box-shadow .3s;
  resize: vertical;
}
.form-field input:focus, .form-field select:focus, .form-field textarea:focus {
  border-color: var(--orange-500);
  box-shadow: 0 0 0 4px rgba(var(--brand-rgb), .1);
}
.form-field input::placeholder, .form-field textarea::placeholder { color: var(--gray-400); }

/* 表单提交状态提示 */
.form-status {
  display: none;
  margin-top: 4px;
  padding: 14px 18px;
  border-radius: 12px;
  font-size: 13.5px;
  line-height: 1.7;
  background: rgba(var(--brand-rgb), .08);
  border: 1px solid rgba(var(--brand-rgb), .28);
  color: var(--orange-600);
}
.form-status.show { display: block; animation: statusIn .4s var(--ease); }
@keyframes statusIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: none; }
}

/* ==========================================================================
   页脚
   ========================================================================== */
.site-footer { background: var(--navy-950); color: rgba(255, 255, 255, .62); padding: 64px 0 40px; }
.footer-inner {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 40px;
  align-items: start;
}
.footer-brand { display: flex; gap: 16px; align-items: flex-start; }
.footer-logo { width: 54px; height: 54px; border-radius: 12px; background: #fff; }
.footer-brand strong {
  display: block;
  color: #fff;
  font-size: 16px;
  letter-spacing: .06em;
  margin-bottom: 6px;
}
.footer-brand span { display: block; font-size: 13px; line-height: 1.7; }
.footer-nav { display: flex; flex-direction: column; gap: 12px; }
.footer-nav a { font-size: 14px; transition: color .3s; }
.footer-nav a:hover { color: var(--orange-400); }
.footer-contact { display: flex; flex-direction: column; gap: 12px; font-size: 14px; text-align: right; }
.footer-contact span:first-child { color: var(--amber); }
/* 机构简介：可见但低视觉权重，便于检索与摘要提取 */
.footer-seo {
  border-top: 1px solid rgba(255, 255, 255, .07);
  margin-top: 34px;
  padding: 20px 32px 10px;
  font-size: 12px;
  line-height: 1.9;
  color: rgba(255, 255, 255, .38);
}
.footer-seo a {
  color: rgba(255, 255, 255, .5);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color .3s;
}
.footer-seo a:hover { color: var(--orange-400); }

/* 不起眼的次级入口 */
.footer-mini-links { margin-top: 4px; }
.footer-mini-links a {
  font-size: 12px;
  color: rgba(255, 255, 255, .34);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color .3s;
}
.footer-mini-links a:hover { color: rgba(255, 255, 255, .62); }

/* ==========================================================================
   入场动画
   ========================================================================== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity .8s var(--ease), transform .8s var(--ease);
}
.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  #rotor, .hs-core, .pulse-dot-bg, .clients-track,
  .data-ring, .scan-line { animation: none !important; }
}

/* ==========================================================================
   首页背景视频 + 品牌宣传片
   ========================================================================== */
.hero-bg-img,
.hero-video { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.hero-video {
  opacity: 0;
  transition: opacity 1.4s var(--ease);
  z-index: 1;
}
.hero-video.ready { opacity: 1; }
.hero-overlay { z-index: 2; }


/* 品牌宣传片区 */
.promo { background: var(--navy-950); color: #fff; }
.promo .section-title { color: #fff; }
.promo .section-desc { color: rgba(255, 255, 255, .6); }
.promo-player {
  position: relative;
  border-radius: 22px;
  overflow: hidden;
  background: #000;
  border: 1px solid rgba(255, 255, 255, .12);
  box-shadow: 0 30px 80px rgba(3, 9, 16, .5);
  line-height: 0;
}
.promo-video { width: 100%; height: auto; display: block; }
.promo-cover {
  position: absolute; inset: 0;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: 18px;
  cursor: pointer;
  background: linear-gradient(180deg, rgba(6, 13, 22, .35), rgba(6, 13, 22, .7));
  transition: opacity .5s var(--ease), visibility .5s;
  line-height: 1.6;
}
.promo-cover.hidden { opacity: 0; visibility: hidden; }
.promo-play {
  width: 78px; height: 78px;
  border-radius: 50%;
  display: grid; place-items: center;
  color: #fff;
  background: var(--grad-brand);
  box-shadow: 0 14px 40px rgba(240, 90, 30, .45);
  transition: transform .35s var(--ease), box-shadow .35s;
}
.promo-play svg { width: 34px; height: 34px; }
.promo-cover:hover .promo-play { transform: scale(1.08); box-shadow: 0 18px 50px rgba(240, 90, 30, .6); }
.promo-cover span { font-size: 14px; letter-spacing: .2em; color: rgba(255, 255, 255, .85); }
.promo-meta { margin-top: 32px; display: flex; justify-content: center; }

/* 预览页 */
.mini-topbar { background: var(--navy-950); border-bottom: 1px solid rgba(255, 255, 255, .08); }
.mini-topbar-inner { display: flex; align-items: center; justify-content: space-between; height: 62px; }
.mini-brand { display: flex; align-items: center; gap: 10px; color: #fff; }
.mini-brand img { width: 34px; height: 34px; border-radius: 8px; background: #fff; }
.mini-brand span { font-size: 15px; letter-spacing: .1em; display: flex; flex-direction: column; line-height: 1.3; }
.mini-brand em { font-style: normal; font-size: 9.5px; letter-spacing: .18em; color: rgba(255, 255, 255, .5); }
.mini-nav { display: flex; gap: 22px; }
.mini-nav a { font-size: 13px; color: rgba(255, 255, 255, .62); transition: color .3s; }
.mini-nav a:hover { color: #fff; }

.promo-main { max-width: 940px; padding: 46px 32px 72px; color: var(--ink); }
.promo-main h1 { font-size: 27px; letter-spacing: .04em; margin-bottom: 14px; color: var(--navy-900); }
.promo-lead { font-size: 14px; color: var(--gray-600); line-height: 1.85; margin-bottom: 34px; }
.promo-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 28px 30px;
  margin-bottom: 22px;
}
.promo-card > h2 {
  font-size: 16px; letter-spacing: .08em; color: var(--navy-900);
  padding-bottom: 14px; margin-bottom: 16px; border-bottom: 1px solid var(--line);
}
.promo-note { font-size: 13px; color: var(--gray-600); line-height: 1.85; }
.promo-card .promo-note { margin-bottom: 16px; }
.promo-hero {
  position: relative;
  width: 100%; height: 52vh; min-height: 300px;
  overflow: hidden; border-radius: 12px; background: #000;
}
.promo-hero video { width: 100%; height: 100%; object-fit: cover; display: block; }
.promo-hero-mask {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  background: rgba(0, 0, 0, .32);
  color: #fff; font-size: 24px; font-weight: 600; letter-spacing: .3em;
}
.promo-status {
  display: flex; align-items: center; gap: 10px;
  margin-top: 14px; font-size: 13px; color: var(--gray-600);
}
.ps-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--gray-400); }
.promo-status.ok .ps-dot { background: #38d47a; box-shadow: 0 0 0 4px rgba(56, 212, 122, .18); }
.promo-status.ok .ps-text { color: var(--ink); }

.promo-check { list-style: none; margin-bottom: 16px; }
.promo-check li {
  display: flex; align-items: center; gap: 12px;
  padding: 11px 0; border-bottom: 1px dashed var(--line); font-size: 13.5px; color: var(--gray-600);
}
.promo-check li:last-child { border-bottom: none; }
.promo-check li i { width: 8px; height: 8px; border-radius: 50%; background: var(--gray-400); flex: none; }
.promo-check li.good i { background: #38d47a; }
.promo-check li.bad i { background: #e0603a; }
.promo-check li b { margin-left: auto; font-weight: 600; color: var(--ink); }
.promo-list { padding-left: 20px; }
.promo-list li { font-size: 13.5px; color: var(--gray-600); line-height: 1.9; margin-bottom: 8px; }
.promo-list code, .promo-note code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12.5px;
  background: var(--mist);
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: 1px 6px;
  color: var(--orange-700);
}
.promo-code {
  background: var(--navy-950);
  color: rgba(255, 255, 255, .78);
  border-radius: 12px;
  padding: 20px 22px;
  overflow-x: auto;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12.5px;
  line-height: 1.85;
}
.promo-updated { font-size: 12px; color: var(--gray-400); margin-top: 26px; }

@media (max-width: 700px) {
  .promo-main { padding: 34px 20px 56px; }
  .promo-card { padding: 22px 20px; }
      .promo-hero-mask { font-size: 17px; letter-spacing: .18em; }
}

/* ==========================================================================
   FAQ 独立页（弱化展示，面向搜索引擎与大模型抓取）
   ========================================================================== */
.faq-page { background: var(--mist); }
.faq-topbar {
  background: var(--navy-950);
  border-bottom: 1px solid rgba(255, 255, 255, .08);
}
.faq-topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 62px;
}
.faq-brand { display: flex; align-items: center; gap: 10px; color: #fff; }
.faq-brand img { width: 34px; height: 34px; border-radius: 8px; background: #fff; }
.faq-brand span { font-size: 15px; letter-spacing: .1em; display: flex; flex-direction: column; line-height: 1.3; }
.faq-brand em {
  font-style: normal;
  font-size: 9.5px;
  letter-spacing: .18em;
  color: rgba(255, 255, 255, .5);
}
.faq-back { font-size: 13px; color: rgba(255, 255, 255, .65); transition: color .3s; }
.faq-back:hover { color: #fff; }

.faq-main { padding: 46px 32px 72px; max-width: 900px; }
.faq-main h1 { font-size: 27px; letter-spacing: .04em; margin-bottom: 14px; }
.faq-lead { font-size: 14px; color: var(--gray-600); margin-bottom: 34px; line-height: 1.85; }

.faq-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 28px 30px;
  margin-bottom: 22px;
}
.faq-card > h2 {
  font-size: 16px;
  letter-spacing: .08em;
  color: var(--navy-900);
  padding-bottom: 14px;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--line);
}
.faq-item { padding: 14px 0; border-bottom: 1px dashed var(--line); }
.faq-item:last-child { border-bottom: none; padding-bottom: 0; }
.faq-item h3 {
  font-size: 14.5px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 8px;
  line-height: 1.6;
}
.faq-item p { font-size: 13.5px; color: var(--gray-600); line-height: 1.9; }

.faq-facts { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 28px; }
.faq-facts > div { display: flex; gap: 12px; font-size: 13.5px; }
.faq-facts dt { flex: none; width: 76px; color: var(--gray-600); }
.faq-facts dd { color: var(--ink); }

.faq-table-wrap { overflow-x: auto; }
.faq-table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.faq-table th, .faq-table td {
  text-align: left;
  padding: 11px 14px;
  border-bottom: 1px solid var(--line);
  color: var(--gray-600);
}
.faq-table th { color: var(--navy-900); background: var(--mist); font-weight: 600; }
.faq-table td:last-child { color: var(--ink); }

.faq-updated { font-size: 12px; color: var(--gray-400); margin-top: 26px; }
.faq-footer {
  background: var(--navy-950);
  color: rgba(255, 255, 255, .5);
  padding: 22px 0;
  font-size: 12.5px;
}
.faq-footer .container { display: flex; gap: 24px; flex-wrap: wrap; }
.faq-footer a { color: rgba(255, 255, 255, .6); }
.faq-footer a:hover { color: var(--orange-400); }

@media (max-width: 700px) {
  .faq-main { padding: 34px 20px 56px; }
  .faq-card { padding: 22px 20px; }
  .faq-facts { grid-template-columns: 1fr; }
}

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width: 1080px) {
  .demo-stage { grid-template-columns: 1fr; }
  .turbine-stage { min-height: 560px; }
  .ts-frame { height: 100%; }
  .demo-panel { max-width: 640px; margin: 0 auto; width: 100%; }
  .product-grid { grid-template-columns: 1fr 1fr; }
  .about-grid { grid-template-columns: 1fr; }
  .about-media { position: static; }
  .footer-inner { grid-template-columns: 1fr; }
  .footer-contact { text-align: left; }
}

@media (max-width: 820px) {
  .section { padding: 84px 0; }
  .main-nav {
    position: fixed;
    inset: 0;
    flex-direction: column;
    justify-content: center;
    gap: 30px;
    background: rgba(6, 13, 22, .96);
    backdrop-filter: blur(16px);
    transform: translateY(-100%);
    transition: transform .45s var(--ease);
    z-index: 1001;
  }
  .main-nav.open { transform: none; }
  .main-nav .nav-link { font-size: 22px; color: #fff; }
  .menu-toggle { display: flex; }
  .brand-logo { width: 40px; height: 40px; }
  .brand-text strong { font-size: 16px; }

  .product-feature { grid-template-columns: 1fr; }
  .pf-media { min-height: 260px; }
  .pf-media::after { background: linear-gradient(0deg, rgba(11, 31, 51, .8) 0%, transparent 55%); }
  .pf-list { grid-template-columns: 1fr; }
  .product-grid { grid-template-columns: 1fr; }
  .news-card { flex: 0 0 100%; }
  .news-head { flex-direction: column; align-items: flex-start; gap: 26px; }
  .contact-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .hero-stats { gap: 26px 38px; }
  .loop-arrow { display: none; }
  .loop-step { flex: 1 1 44%; }
}

@media (max-width: 520px) {
  .container { padding: 0 20px; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .news-card { padding: 28px 24px; }
  .news-body p { -webkit-line-clamp: 4; }
  .nc-btn { width: 40px; height: 40px; }
  .hero-content { padding: 40px 0 10vh; }
  .turbine-stage { min-height: 430px; }
  .ts-frame { aspect-ratio: 560 / 660; }
  .hs-label { font-size: 10.5px; padding: 4px 9px; letter-spacing: .04em; }
  .hs-dot { width: 12px; height: 12px; border-width: 2px; }
  .ts-hint { display: none; }
  .brand-text em { display: none; }
}