/* =========================================================
   LoongSeek 隆实探界 — 企业官网公共样式
   纯 CSS，无框架。响应式，移动端优先增强。
   ========================================================= */

/* ---------- 设计变量 ---------- */
:root {
  --c-ink: #0c2236;
  --c-text: #2a3b4d;
  --c-muted: #6b7c8c;
  --c-line: #e7edf3;
  --c-bg: #ffffff;
  --c-bg-soft: #f5f8fb;
  --c-navy: #071a30;
  --c-navy-2: #0d2848;
  --c-accent: #13c08a;   /* 能源绿 */
  --c-accent-2: #2a9bff; /* 科技蓝 */
  --grad: linear-gradient(120deg, #13c08a 0%, #2a9bff 100%);
  --grad-soft: linear-gradient(120deg, rgba(19,192,138,.12), rgba(42,155,255,.12));
  --c-primary: #0ea47a;   /* 实色主按钮 */
  --c-primary-d: #0b8a66; /* 主按钮 hover */
  --shadow-sm: 0 4px 16px rgba(12, 34, 54, .06);
  --shadow-md: 0 18px 40px rgba(12, 34, 54, .10);
  --shadow-lg: 0 30px 70px rgba(7, 26, 48, .18);
  --radius: 16px;
  --radius-lg: 24px;
  --maxw: 1200px;
  --ease: cubic-bezier(.22, .61, .36, 1);
}

/* ---------- 重置 ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

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

body {
  font-family: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei",
    "Segoe UI", system-ui, -apple-system, Roboto, Helvetica, Arial, sans-serif;
  color: var(--c-text);
  background: var(--c-bg);
  line-height: 1.7;
  font-size: 16px;
  letter-spacing: .01em;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color .25s var(--ease); }
ul { list-style: none; }
h1, h2, h3, h4 { color: var(--c-ink); line-height: 1.25; font-weight: 700; }

/* ---------- 容器 ---------- */
.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

.section { padding: 96px 0; position: relative; }
.section--soft { background: var(--c-bg-soft); }
.section--dark { background: var(--c-navy); color: #cdd9e6; }
.section--dark h2, .section--dark h3 { color: #fff; }

/* ---------- 通用文字/标题 ---------- */
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 600; letter-spacing: .14em;
  text-transform: uppercase; color: var(--c-accent-2);
  margin-bottom: 16px;
}
.eyebrow::before { content: ""; width: 24px; height: 2px; background: var(--grad); border-radius: 2px; }

.section-head { max-width: 720px; margin: 0 auto 56px; text-align: center; }
.section-head .eyebrow { justify-content: center; }
.section-head h2 { font-size: clamp(28px, 4vw, 42px); letter-spacing: -.01em; }
.section-head p { margin-top: 16px; color: var(--c-muted); font-size: 17px; }

.text-grad {
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 14px 28px; border-radius: 999px; font-weight: 600; font-size: 15px;
  cursor: pointer; border: 1px solid transparent; transition: all .3s var(--ease);
  white-space: nowrap; will-change: transform;
}
.btn--primary { background: var(--c-primary); color: #fff; box-shadow: 0 10px 24px rgba(14,164,122,.26); }
.btn--primary:hover { transform: translateY(-2px); background: var(--c-primary-d); box-shadow: 0 16px 34px rgba(14,164,122,.32); }
.btn--ghost { background: transparent; color: var(--c-ink); border-color: var(--c-line); }
.btn--ghost:hover { border-color: var(--c-accent-2); color: var(--c-accent-2); transform: translateY(-2px); }
.btn--light { background: rgba(255,255,255,.1); color: #fff; border-color: rgba(255,255,255,.25); backdrop-filter: blur(6px); }
.btn--light:hover { background: rgba(255,255,255,.18); transform: translateY(-2px); }

/* ---------- 顶部导航 ---------- */
.header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  transition: all .35s var(--ease);
  background: rgba(255,255,255,0);
}
.header.scrolled {
  background: rgba(255,255,255,.82);
  backdrop-filter: saturate(180%) blur(14px);
  box-shadow: var(--shadow-sm);
  border-bottom: 1px solid var(--c-line);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 76px; }

.brand { display: flex; align-items: center; gap: 12px; font-weight: 800; font-size: 20px; color: var(--c-ink); letter-spacing: .02em; }
.brand__mark { width: 38px; height: 38px; flex: none; }
.brand__sub { font-size: 12px; font-weight: 500; color: var(--c-muted); letter-spacing: .22em; display: block; line-height: 1; margin-top: 3px; }
.brand__name { display: flex; flex-direction: column; }
.header:not(.scrolled) .brand.is-light, .header:not(.scrolled) .brand.is-light .brand__sub { color: #fff; }

.nav__links { display: flex; align-items: center; gap: 4px; }
.nav__links a {
  position: relative; padding: 10px 18px; font-weight: 500; font-size: 15px;
  color: var(--c-text); border-radius: 10px;
}
.header:not(.scrolled) .nav__links.is-light a { color: rgba(255,255,255,.86); }
.nav__links a::after {
  content: ""; position: absolute; left: 18px; right: 18px; bottom: 6px; height: 2px;
  background: var(--grad); border-radius: 2px; transform: scaleX(0); transform-origin: left;
  transition: transform .3s var(--ease);
}
.nav__links a:hover, .nav__links a.active { color: var(--c-accent-2); }
.header:not(.scrolled) .nav__links.is-light a:hover { color: #fff; }
.nav__links a:hover::after, .nav__links a.active::after { transform: scaleX(1); }

.nav__links .btn { display: none; } /* 桌面端隐藏菜单内的 CTA，避免与右侧按钮重复 */
.nav__cta { display: flex; align-items: center; gap: 14px; }

/* 移动端汉堡 */
.nav__toggle {
  display: none; width: 44px; height: 44px; border: none; background: transparent;
  cursor: pointer; position: relative; z-index: 110;
}
.nav__toggle span {
  display: block; width: 24px; height: 2px; background: var(--c-ink); margin: 5px auto;
  transition: all .3s var(--ease); border-radius: 2px;
}
.header:not(.scrolled) .nav__toggle.is-light span { background: #fff; }
.nav__toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__toggle.open span:nth-child(2) { opacity: 0; }
.nav__toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.nav__toggle.open span { background: var(--c-ink) !important; }

/* ---------- Hero ---------- */
.hero {
  position: relative; min-height: 100vh; display: flex; align-items: center;
  color: #eaf2fb; overflow: hidden;
  background:
    radial-gradient(1100px 600px at 80% -10%, rgba(42,155,255,.18), transparent 60%),
    radial-gradient(900px 600px at 0% 110%, rgba(19,192,138,.16), transparent 55%),
    linear-gradient(160deg, #06182d 0%, #0a2140 60%, #06182d 100%);
  background-color: #06182d;
}
.hero__grid {
  position: absolute; inset: 0;
  background-image: linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(circle at 50% 40%, #000 0%, transparent 75%);
  -webkit-mask-image: radial-gradient(circle at 50% 40%, #000 0%, transparent 75%);
}
.hero__glow { position: absolute; border-radius: 50%; filter: blur(80px); opacity: .5; pointer-events: none; }
.hero__glow--1 { width: 420px; height: 420px; background: #13c08a; top: -80px; right: 10%; animation: float 9s ease-in-out infinite; }
.hero__glow--2 { width: 360px; height: 360px; background: #2a9bff; bottom: -60px; left: 6%; animation: float 11s ease-in-out infinite reverse; }
.hero__canvas { position: absolute; inset: 0; z-index: 1; width: 100%; height: 100%; display: block; pointer-events: none; }

/* 流动极光背景 */
.hero__aurora { position: absolute; inset: 0; overflow: hidden; pointer-events: none; }
.aurora { position: absolute; border-radius: 50%; filter: blur(80px); mix-blend-mode: screen; opacity: .55; will-change: transform; }
.aurora--1 { width: 60vw; height: 60vw; top: -22%; left: -8%; background: radial-gradient(circle at 35% 35%, rgba(19,192,138,.95), rgba(19,192,138,0) 62%); animation: auroraA 19s ease-in-out infinite; }
.aurora--2 { width: 55vw; height: 55vw; top: -16%; right: -12%; background: radial-gradient(circle at 60% 40%, rgba(42,155,255,.9), rgba(42,155,255,0) 62%); animation: auroraB 24s ease-in-out infinite; }
.aurora--3 { width: 52vw; height: 52vw; bottom: -28%; left: 12%; background: radial-gradient(circle at 50% 50%, rgba(124,108,255,.8), rgba(124,108,255,0) 62%); animation: auroraC 28s ease-in-out infinite; }
.aurora--4 { width: 46vw; height: 46vw; bottom: -20%; right: 4%; background: radial-gradient(circle at 45% 55%, rgba(38,210,190,.82), rgba(38,210,190,0) 62%); animation: auroraD 22s ease-in-out infinite; }
@keyframes auroraA { 0%,100% { transform: translate(0,0) scale(1); } 33% { transform: translate(14%,10%) scale(1.25); } 66% { transform: translate(-6%,6%) scale(.95); } }
@keyframes auroraB { 0%,100% { transform: translate(0,0) scale(1); } 30% { transform: translate(-12%,12%) scale(1.15); } 60% { transform: translate(8%,-6%) scale(1.3); } }
@keyframes auroraC { 0%,100% { transform: translate(0,0) scale(1.05); } 40% { transform: translate(10%,-10%) scale(1.3); } 75% { transform: translate(-10%,4%) scale(.9); } }
@keyframes auroraD { 0%,100% { transform: translate(0,0) scale(1); } 35% { transform: translate(-10%,-8%) scale(1.2); } 70% { transform: translate(6%,8%) scale(1.05); } }
@media (prefers-reduced-motion: reduce) { .aurora { animation: none !important; } }

.hero__inner { position: relative; z-index: 2; max-width: 880px; padding: 120px 0 80px; }
.hero__badge {
  display: inline-flex; align-items: center; gap: 10px; padding: 8px 16px; border-radius: 999px;
  background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.16);
  font-size: 13px; letter-spacing: .04em; margin-bottom: 28px; backdrop-filter: blur(6px);
}
.hero__badge .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--c-accent); box-shadow: 0 0 0 4px rgba(19,192,138,.25); }
.hero h1 {
  color: #fff; font-size: clamp(34px, 6vw, 64px); line-height: 1.1; letter-spacing: -.02em;
  font-weight: 800; margin-bottom: 24px;
}
.hero p.lead { font-size: clamp(16px, 2.2vw, 20px); color: #b9cadd; max-width: 640px; margin-bottom: 40px; }
.hero__actions { display: flex; gap: 16px; flex-wrap: wrap; }

.hero__stats { display: flex; gap: 48px; margin-top: 64px; flex-wrap: wrap; }
.hero__stats .num { font-size: clamp(26px, 4vw, 38px); font-weight: 800; color: #fff; }
.hero__stats .num span { background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.hero__stats .lab { font-size: 14px; color: #93a8bf; margin-top: 4px; }

.hero__scroll {
  position: absolute; bottom: 28px; left: 50%; transform: translateX(-50%); z-index: 2;
  font-size: 12px; letter-spacing: .2em; color: #7e93ab; text-align: center;
}
.hero__scroll .mouse { width: 24px; height: 38px; border: 2px solid rgba(255,255,255,.3); border-radius: 14px; margin: 0 auto 8px; position: relative; }
.hero__scroll .mouse::after { content: ""; position: absolute; top: 7px; left: 50%; width: 4px; height: 7px; margin-left: -2px; background: #fff; border-radius: 2px; animation: scrollDot 1.8s infinite; }

/* ---------- 信任栏 ---------- */
.trust { padding: 40px 0; border-bottom: 1px solid var(--c-line); }
.trust__wrap { display: flex; align-items: center; justify-content: space-between; gap: 32px; flex-wrap: wrap; }
.trust__label { font-size: 13px; color: var(--c-muted); letter-spacing: .1em; }
.trust__logos { display: flex; gap: 40px; flex-wrap: wrap; align-items: center; opacity: .65; }
.trust__logos span { font-weight: 700; font-size: 18px; color: var(--c-ink); letter-spacing: .04em; }

/* ---------- 业务/服务卡片 ---------- */
.grid { display: grid; gap: 24px; }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius-lg);
  padding: 36px 32px; transition: all .4s var(--ease); position: relative; overflow: hidden;
}
.card::before {
  content: ""; position: absolute; inset: 0; border-radius: inherit;
  background: var(--grad-soft); opacity: 0; transition: opacity .4s var(--ease);
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: transparent; }
.card:hover::before { opacity: 1; }
.card > * { position: relative; z-index: 1; }
.card__icon {
  width: 60px; height: 60px; border-radius: 16px; display: grid; place-items: center;
  background: var(--grad); color: #fff; margin-bottom: 22px; box-shadow: 0 10px 22px rgba(42,155,255,.25);
}
.card__icon svg { width: 30px; height: 30px; }
.card h3 { font-size: 21px; margin-bottom: 12px; }
.card p { color: var(--c-muted); font-size: 15px; }
.card__link { display: inline-flex; align-items: center; gap: 6px; margin-top: 20px; font-weight: 600; color: var(--c-accent-2); font-size: 14px; }
.card__link svg { width: 16px; height: 16px; transition: transform .3s var(--ease); }
.card:hover .card__link svg { transform: translateX(4px); }

/* ---------- 双栏图文 ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.split__media {
  position: relative; border-radius: var(--radius-lg); min-height: 420px; overflow: hidden;
  background: linear-gradient(160deg, #0d2848, #071a30); box-shadow: var(--shadow-lg);
}
.split__media .pattern {
  position: absolute; inset: 0;
  background-image: radial-gradient(rgba(255,255,255,.10) 1.5px, transparent 1.5px);
  background-size: 22px 22px; opacity: .5;
}
.media-badge {
  position: absolute; padding: 18px 22px; border-radius: 16px; background: rgba(255,255,255,.95);
  box-shadow: var(--shadow-md); backdrop-filter: blur(8px);
}
.media-badge .k { font-size: 26px; font-weight: 800; color: var(--c-ink); }
.media-badge .v { font-size: 13px; color: var(--c-muted); }
.media-badge--a { top: 40px; left: 40px; }
.media-badge--b { bottom: 40px; right: 40px; }
.media-core {
  position: absolute; inset: 0; display: grid; place-items: center; color: #fff;
}
.media-core .ring { width: 180px; height: 180px; border-radius: 50%; border: 2px dashed rgba(255,255,255,.25); display: grid; place-items: center; animation: spin 22s linear infinite; }
.media-core .ring2 { width: 120px; height: 120px; border-radius: 50%; border: 2px solid rgba(19,192,138,.5); display: grid; place-items: center; }
.media-core .core { width: 64px; height: 64px; border-radius: 18px; background: var(--grad); display: grid; place-items: center; box-shadow: 0 0 40px rgba(19,192,138,.6); }
.media-core .core svg { width: 34px; height: 34px; color: #fff; }

.feature-list { margin-top: 28px; display: grid; gap: 18px; }
.feature-list li { display: flex; gap: 14px; align-items: flex-start; }
.feature-list .ic { flex: none; width: 26px; height: 26px; border-radius: 8px; background: var(--grad-soft); color: var(--c-accent); display: grid; place-items: center; margin-top: 3px; }
.feature-list .ic svg { width: 16px; height: 16px; }
.feature-list b { color: var(--c-ink); display: block; font-size: 16px; }
.feature-list span { color: var(--c-muted); font-size: 14px; }

/* ---------- 数据统计 ---------- */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; text-align: center; }
.stat__num { font-size: clamp(32px, 5vw, 52px); font-weight: 800; line-height: 1; }
.stat__num span { background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.stat__lab { margin-top: 10px; color: var(--c-muted); font-size: 15px; }

/* ---------- 流程步骤 ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; counter-reset: step; }
.step { padding: 28px; border-radius: var(--radius); background: #fff; border: 1px solid var(--c-line); position: relative; }
.step__no { font-size: 14px; font-weight: 700; color: var(--c-accent-2); letter-spacing: .1em; }
.step h4 { font-size: 18px; margin: 10px 0 8px; }
.step p { font-size: 14px; color: var(--c-muted); }

/* ---------- CTA 横幅 ---------- */
.cta-band { position: relative; overflow: hidden; border-radius: var(--radius-lg); padding: 64px; text-align: center; color: #fff; background: linear-gradient(120deg, #0b2342, #0d2848); }
.cta-band::before { content: ""; position: absolute; inset: 0; background: radial-gradient(600px 300px at 50% -20%, rgba(42,155,255,.4), transparent 60%); }
.cta-band > * { position: relative; z-index: 1; }
.cta-band h2 { color: #fff; font-size: clamp(26px, 4vw, 40px); margin-bottom: 16px; }
.cta-band p { color: #b9cadd; max-width: 600px; margin: 0 auto 32px; }
.cta-band .hero__actions { justify-content: center; }

/* ---------- 关于页 价值观 ---------- */
.values { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.value { padding: 32px; border-radius: var(--radius); border: 1px solid var(--c-line); background: #fff; }
.value h4 { font-size: 19px; margin: 16px 0 8px; }
.value p { color: var(--c-muted); font-size: 15px; }
.value .vic { width: 52px; height: 52px; border-radius: 14px; background: var(--grad-soft); color: var(--c-accent-2); display: grid; place-items: center; }
.value .vic svg { width: 26px; height: 26px; }

/* 时间轴 */
.timeline { position: relative; max-width: 820px; margin: 0 auto; padding-left: 28px; }
.timeline::before { content: ""; position: absolute; left: 6px; top: 8px; bottom: 8px; width: 2px; background: linear-gradient(var(--c-accent), var(--c-accent-2)); }
.tl-item { position: relative; padding: 0 0 40px 36px; }
.tl-item::before { content: ""; position: absolute; left: -2px; top: 4px; width: 16px; height: 16px; border-radius: 50%; background: #fff; border: 3px solid var(--c-accent-2); box-shadow: 0 0 0 4px rgba(42,155,255,.12); }
.tl-item .yr { font-weight: 800; color: var(--c-accent-2); font-size: 18px; }
.tl-item h4 { margin: 6px 0; font-size: 18px; }
.tl-item p { color: var(--c-muted); font-size: 15px; }

/* ---------- 内页头部 ---------- */
.pagehead {
  position: relative; padding: 168px 0 80px; color: #fff; overflow: hidden;
  background:
    radial-gradient(800px 400px at 85% -20%, rgba(42,155,255,.30), transparent 60%),
    radial-gradient(700px 400px at 0% 120%, rgba(19,192,138,.22), transparent 55%),
    linear-gradient(160deg, #071a30, #0b2342);
}
.pagehead .hero__grid { opacity: .6; }
.pagehead__inner { position: relative; z-index: 2; max-width: 760px; }
.pagehead h1 { color: #fff; font-size: clamp(30px, 5vw, 50px); margin-bottom: 16px; letter-spacing: -.01em; }
.pagehead p { color: #b9cadd; font-size: 18px; }
.crumbs { font-size: 14px; color: #8aa0b8; margin-bottom: 20px; }
.crumbs a:hover { color: #fff; }

/* ---------- 产品 标签页 ---------- */
.tabs { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-bottom: 48px; }
.tab {
  padding: 12px 26px; border-radius: 999px; border: 1px solid var(--c-line); background: #fff;
  font-weight: 600; font-size: 15px; color: var(--c-text); cursor: pointer; transition: all .3s var(--ease);
}
.tab.active, .tab:hover { background: var(--c-primary); color: #fff; border-color: transparent; box-shadow: 0 10px 22px rgba(14,164,122,.22); }
.tabpanel { display: none; animation: fadeUp .5s var(--ease); }
.tabpanel.active { display: block; }

.spec { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px 40px; margin-top: 24px; }
.spec li { display: flex; justify-content: space-between; padding: 14px 0; border-bottom: 1px dashed var(--c-line); }
.spec li b { color: var(--c-ink); }
.spec li span { color: var(--c-muted); }

/* ---------- 联系页 ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 48px; align-items: start; }
.info-card { background: var(--c-navy); color: #cdd9e6; border-radius: var(--radius-lg); padding: 40px; }
.info-card h3 { color: #fff; margin-bottom: 24px; }
.info-item { display: flex; gap: 16px; align-items: flex-start; margin-bottom: 26px; }
.info-item .ic { flex: none; width: 46px; height: 46px; border-radius: 12px; background: rgba(255,255,255,.08); display: grid; place-items: center; color: var(--c-accent); }
.info-item .ic svg { width: 22px; height: 22px; }
.info-item .lab { font-size: 13px; color: #8aa0b8; }
.info-item .val { color: #fff; font-weight: 600; font-size: 16px; }

.form { background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius-lg); padding: 40px; box-shadow: var(--shadow-sm); }
.field { margin-bottom: 22px; }
.field label { display: block; font-size: 14px; font-weight: 600; color: var(--c-ink); margin-bottom: 8px; }
.field input, .field textarea, .field select {
  width: 100%; padding: 14px 16px; border: 1px solid var(--c-line); border-radius: 12px;
  font-size: 15px; font-family: inherit; color: var(--c-ink); background: var(--c-bg-soft);
  transition: all .25s var(--ease);
}
.field textarea { resize: vertical; min-height: 130px; }
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none; border-color: var(--c-accent-2); background: #fff; box-shadow: 0 0 0 4px rgba(42,155,255,.12);
}
.field--row { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.form__note { font-size: 13px; color: var(--c-muted); margin-top: 8px; }
.form__msg { display: none; padding: 14px 18px; border-radius: 12px; background: var(--grad-soft); color: var(--c-ink); font-size: 14px; margin-bottom: 20px; border: 1px solid rgba(19,192,138,.3); }
.form__msg.show { display: block; }

.map-embed { margin-top: 28px; border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--c-line); min-height: 260px; background: linear-gradient(160deg,#0d2848,#071a30); position: relative; }
.map-embed .pin { position: absolute; top: 50%; left: 50%; transform: translate(-50%,-100%); color: #fff; text-align: center; }
.map-embed .pin svg { width: 40px; height: 40px; color: var(--c-accent); filter: drop-shadow(0 6px 12px rgba(0,0,0,.4)); }

/* ---------- 页脚 ---------- */
.footer { background: #06141f; color: #9fb2c4; padding: 72px 0 0; }
.footer__top { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 48px; border-bottom: 1px solid rgba(255,255,255,.08); }
.footer__brand .brand { color: #fff; margin-bottom: 18px; }
.footer__brand .brand__sub { color: #6c8298; }
.footer__brand p { font-size: 14px; color: #7e93a8; max-width: 320px; }
.footer__social { display: flex; gap: 12px; margin-top: 22px; }
.footer__social a { width: 40px; height: 40px; border-radius: 10px; background: rgba(255,255,255,.06); display: grid; place-items: center; color: #9fb2c4; }
.footer__social a:hover { background: var(--c-primary); color: #fff; transform: translateY(-3px); }
.footer__social svg { width: 18px; height: 18px; }
.footer__col h4 { color: #fff; font-size: 15px; margin-bottom: 18px; letter-spacing: .04em; }
.footer__col a { display: block; font-size: 14px; color: #8499ac; padding: 6px 0; }
.footer__col a:hover { color: var(--c-accent); }
.footer__contact li { font-size: 14px; color: #8499ac; margin-bottom: 12px; display: flex; gap: 10px; }
.footer__contact svg { width: 18px; height: 18px; color: var(--c-accent); flex: none; }

/* 备案区 */
.beian { padding: 24px 0 30px; }
.beian__wrap { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 8px 24px; font-size: 13px; color: #6f8499; text-align: center; }
.beian__wrap a { color: #6f8499; display: inline-flex; align-items: center; gap: 7px; transition: color .25s var(--ease); }
.beian__wrap a:hover { color: var(--c-accent); }
.beian__police img, .beian__police svg { width: 18px; height: 18px; vertical-align: middle; }
.beian__sep { color: rgba(255,255,255,.14); }
.copyright { text-align: center; font-size: 13px; color: #5d7186; padding-bottom: 28px; }

/* ---------- 动画 ---------- */
@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-26px); } }
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes scrollDot { 0% { opacity: 1; transform: translateY(0); } 70% { opacity: 0; transform: translateY(12px); } 100% { opacity: 0; } }
@keyframes fadeUp { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: translateY(0); } }

.reveal { opacity: 0; transform: translateY(28px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.in { opacity: 1; transform: none; }
.reveal[data-delay="1"] { transition-delay: .1s; }
.reveal[data-delay="2"] { transition-delay: .2s; }
.reveal[data-delay="3"] { transition-delay: .3s; }

/* ---------- 响应式 ---------- */
@media (max-width: 992px) {
  .split { grid-template-columns: 1fr; gap: 40px; }
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .stats { grid-template-columns: repeat(2, 1fr); gap: 36px 24px; }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .footer__top { grid-template-columns: 1fr 1fr; gap: 32px; }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .section { padding: 68px 0; }
  .nav__links, .nav__cta .btn { display: none; }
  .nav__toggle { display: block; }
  .nav__links {
    position: fixed; top: 0; right: 0; bottom: 0; width: min(80vw, 320px);
    background: #fff; flex-direction: column; align-items: stretch; justify-content: flex-start;
    padding: 96px 24px 32px; gap: 6px; transform: translateX(100%); transition: transform .4s var(--ease);
    box-shadow: -20px 0 60px rgba(0,0,0,.18); z-index: 105;
  }
  .nav__links.open { transform: translateX(0); }
  .nav__links a { padding: 16px 14px; font-size: 17px; border-radius: 12px; color: var(--c-text) !important; }
  .nav__links a.active, .nav__links a:hover { background: var(--grad-soft); }
  .nav__links a::after { display: none; }
  .nav__links .btn { display: inline-flex; margin-top: 16px; }
  .nav-overlay { position: fixed; inset: 0; background: rgba(7,26,48,.5); opacity: 0; visibility: hidden; transition: all .3s var(--ease); z-index: 104; backdrop-filter: blur(2px); }
  .nav-overlay.open { opacity: 1; visibility: visible; }

  .hero__stats { gap: 28px 36px; }
  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
  .values { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .footer__top { grid-template-columns: 1fr; gap: 28px; }
  .field--row { grid-template-columns: 1fr; }
  .cta-band { padding: 40px 24px; }
  .media-badge--a { left: 20px; top: 20px; padding: 12px 16px; }
  .media-badge--b { right: 20px; bottom: 20px; padding: 12px 16px; }
  .beian__sep { display: none; }
}

@media (max-width: 420px) {
  .container { padding: 0 18px; }
  .hero__stats { gap: 22px 28px; }
  .hero__stats .num { font-size: 26px; }
}