/* =========================================================
   广州壹玖纵横 gzyjzh.com —— 现代科技感 / 数据感
   深墨绿·青色暗底 + 亮青薄荷渐变，全程无衬线
   ========================================================= */
:root {
  --ink: #06181c;        /* 主暗底 */
  --ink-2: #0a2b2e;      /* 次级暗底 */
  --ink-3: #0f3b3d;
  --line: rgba(255, 255, 255, .1);
  --mint: #2fd4a8;       /* 亮青 */
  --mint-2: #7ff0cd;     /* 薄荷 */
  --light: #f1f7f6;      /* 浅底（内容面板） */
  --text: #10262a;
  --muted: #5d7a78;
  --radius: 16px;
  --radius-sm: 12px;
  --header-h: 76px;
  --shadow: 0 24px 60px rgba(0, 0, 0, .38);
  --sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Helvetica Neue", Arial, sans-serif;
}

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

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

body {
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.75;
  color: rgba(255, 255, 255, .72);
  background: var(--ink);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; height: auto; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button, input, select, textarea { font-family: inherit; font-size: inherit; }

.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ---------- 区块主题变量（明暗自适应） ---------- */
section {
  position: relative;
  padding: 100px 0;
  background: var(--ink);
  --card-bg: rgba(255, 255, 255, .035);
  --card-line: var(--line);
  --c-head: #fff;
  --c-body: rgba(255, 255, 255, .64);
  --input-bg: rgba(255, 255, 255, .05);
  --input-line: var(--line);
  --input-color: #fff;
}
.section-alt { background: var(--ink-2); }
.section-light {
  background: var(--light);
  color: var(--muted);
  --card-bg: #ffffff;
  --card-line: rgba(6, 24, 28, .09);
  --c-head: var(--text);
  --c-body: var(--muted);
  --input-bg: #f4f8f7;
  --input-line: rgba(6, 24, 28, .13);
  --input-color: var(--text);
}

/* ---------- 排版 ---------- */
.eyebrow {
  font-size: 12px; letter-spacing: 3px; text-transform: uppercase;
  color: var(--mint); font-weight: 700; margin-bottom: 14px;
}
.sec-title {
  font-size: 42px; line-height: 1.28; font-weight: 800;
  letter-spacing: .5px; color: var(--c-head);
}
.sec-title .grad {
  background: linear-gradient(120deg, var(--mint), var(--mint-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.sec-desc { color: var(--c-body); margin-top: 16px; max-width: 660px; }
.sec-head { margin-bottom: 52px; }
.sec-head.center { text-align: center; }
.sec-head.center .sec-desc { margin-left: auto; margin-right: auto; }

/* ---------- 装饰：网格线 / 光晕 ---------- */
.grid-lines {
  position: absolute; inset: 0; pointer-events: none; z-index: 1;
  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: 56px 56px;
  -webkit-mask-image: radial-gradient(circle at 50% 40%, #000 0%, transparent 74%);
  mask-image: radial-gradient(circle at 50% 40%, #000 0%, transparent 74%);
}
.glow { position: absolute; border-radius: 50%; pointer-events: none; filter: blur(18px); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 15px 32px; border: 1px solid transparent; border-radius: 999px;
  font-size: 15px; font-weight: 600; letter-spacing: .5px; cursor: pointer;
  transition: all .3s ease; white-space: nowrap;
}
.btn-mint {
  background: linear-gradient(120deg, var(--mint), var(--mint-2));
  color: #04211d; box-shadow: 0 10px 30px rgba(47, 212, 168, .28);
}
.btn-mint:hover { transform: translateY(-2px); box-shadow: 0 16px 40px rgba(47, 212, 168, .44); }
.btn-ghost { border-color: rgba(255, 255, 255, .3); color: #fff; }
.btn-ghost:hover { background: rgba(255, 255, 255, .1); border-color: var(--mint); color: var(--mint-2); }
.section-light .btn-ghost, .section-light .btn-ghost:hover { color: var(--text); }
.section-light .btn-ghost { border-color: rgba(6, 24, 28, .22); }
.section-light .btn-ghost:hover { background: rgba(6, 24, 28, .05); border-color: var(--mint); color: var(--ink); }
.btn-block { width: 100%; }

/* ---------- 头部 ---------- */
.header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 999; height: var(--header-h);
  display: flex; align-items: center;
  background: rgba(6, 24, 28, .72);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255, 255, 255, .07);
  transition: background .3s ease, box-shadow .3s ease, height .3s ease;
}
.header.scrolled { background: rgba(6, 24, 28, .95); box-shadow: 0 10px 30px rgba(0, 0, 0, .42); }
.header .container { display: flex; align-items: center; justify-content: space-between; gap: 20px; }

.logo { display: flex; align-items: center; gap: 12px; }
.logo-mark {
  width: 44px; height: 44px; border-radius: var(--radius-sm);
  display: grid; place-items: center; font-size: 17px; font-weight: 800; letter-spacing: 1px;
  color: #04211d; background: linear-gradient(135deg, var(--mint), var(--mint-2));
}
.logo-text { color: #fff; font-size: 19px; font-weight: 800; letter-spacing: 2px; }
.logo-sub {
  display: block; font-size: 9px; letter-spacing: 2.5px; text-transform: uppercase;
  color: var(--mint); opacity: .9; font-weight: 600;
}

.nav { display: flex; align-items: center; gap: 34px; }
.nav a {
  position: relative; color: rgba(255, 255, 255, .78); font-size: 15px;
  padding: 6px 0; transition: color .25s ease;
}
.nav a::after {
  content: ""; position: absolute; left: 0; bottom: 0; height: 2px; width: 0;
  border-radius: 2px; background: linear-gradient(90deg, var(--mint), var(--mint-2));
  transition: width .3s ease;
}
.nav a:hover, .nav a.active { color: #fff; }
.nav a:hover::after, .nav a.active::after { width: 100%; }

.header-cta { display: flex; align-items: center; gap: 16px; }
.header-tel { color: var(--mint-2); font-size: 14px; letter-spacing: .5px; }

.nav-toggle {
  display: none; width: 44px; height: 44px; background: transparent;
  border: 1px solid rgba(255, 255, 255, .22); border-radius: var(--radius-sm); cursor: pointer;
  flex-direction: column; align-items: center; justify-content: center; gap: 5px;
}
.nav-toggle span { display: block; width: 20px; height: 2px; border-radius: 2px; background: #fff; transition: .3s; }
.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); }

/* ---------- 首屏 ---------- */
.hero {
  position: relative; min-height: 100vh; padding: 0; display: flex; align-items: center;
  background: var(--ink); color: #fff; overflow: hidden;
}
.hero-bg { position: absolute; inset: 0; }
.hero-bg img { width: 100%; height: 100%; object-fit: cover; opacity: .4; }
.hero::after {
  content: ""; position: absolute; inset: 0; z-index: 1;
  background: linear-gradient(105deg, rgba(6, 24, 28, .96) 0%, rgba(6, 24, 28, .82) 46%, rgba(10, 43, 46, .5) 100%);
}
.hero .glow-a { width: 430px; height: 430px; right: -80px; top: -70px; z-index: 2;
  background: radial-gradient(circle, rgba(47, 212, 168, .38), transparent 70%); }
.hero .glow-b { width: 360px; height: 360px; left: -110px; bottom: -110px; z-index: 2;
  background: radial-gradient(circle, rgba(127, 240, 205, .22), transparent 70%); }
.hero .container { position: relative; z-index: 3; width: 100%; padding-top: var(--header-h); }
.hero-inner { max-width: 820px; }
.hero h1 { font-size: 64px; line-height: 1.18; font-weight: 800; letter-spacing: .5px; margin: 18px 0 24px; }
.hero h1 .grad { background: linear-gradient(120deg, var(--mint), var(--mint-2));
  -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p.lead { font-size: 18px; color: rgba(255, 255, 255, .78); max-width: 660px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-top: 40px; }
.hero-stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 0;
  margin-top: 64px; border-top: 1px solid rgba(255, 255, 255, .14); padding-top: 28px;
}
.hero-stats div { padding-right: 18px; }
.hero-stats strong { display: block; font-size: 34px; font-weight: 800; color: var(--mint-2); line-height: 1.2; }
.hero-stats span { font-size: 13px; color: rgba(255, 255, 255, .6); letter-spacing: .5px; }

/* 内页首屏 */
.page-hero {
  position: relative; padding: calc(var(--header-h) + 96px) 0 96px;
  background: var(--ink); color: #fff; overflow: hidden;
}
.page-hero > img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: .26; }
.page-hero::after {
  content: ""; position: absolute; inset: 0; z-index: 1;
  background: linear-gradient(92deg, rgba(6, 24, 28, .96), rgba(10, 43, 46, .6));
}
.page-hero .container { position: relative; z-index: 3; }
.page-hero h1 { font-size: 46px; font-weight: 800; letter-spacing: .5px; margin-bottom: 16px; }
.page-hero p { color: rgba(255, 255, 255, .72); max-width: 700px; }
.crumb { font-size: 13px; color: rgba(255, 255, 255, .5); margin-bottom: 16px; letter-spacing: 1px; }
.crumb a:hover { color: var(--mint-2); }

/* ---------- 网格 ---------- */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 48px; align-items: center; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }

/* ---------- 优势卡 ---------- */
.adv-card {
  position: relative; overflow: hidden; padding: 36px 30px;
  background: var(--card-bg); border: 1px solid var(--card-line); border-radius: var(--radius);
  transition: all .35s ease;
}
.section-light .adv-card { box-shadow: 0 12px 30px rgba(6, 24, 28, .06); }
.adv-card::after {
  content: ""; position: absolute; right: -40px; top: -40px; width: 130px; height: 130px;
  border-radius: 50%; opacity: 0; transition: opacity .35s ease;
  background: radial-gradient(circle, rgba(47, 212, 168, .2), transparent 70%);
}
.adv-card:hover { transform: translateY(-6px); border-color: rgba(47, 212, 168, .5); box-shadow: 0 20px 50px rgba(0, 0, 0, .3); }
.adv-card:hover::after { opacity: 1; }
.adv-ico {
  width: 52px; height: 52px; border-radius: 14px; margin-bottom: 20px;
  display: grid; place-items: center; color: var(--mint);
  background: rgba(47, 212, 168, .12); border: 1px solid rgba(47, 212, 168, .28);
}
.adv-ico svg { width: 24px; height: 24px; }
.adv-num { position: absolute; right: 26px; top: 22px; font-size: 13px; letter-spacing: 1px; color: var(--c-body); opacity: .55; }
.adv-card h3 { font-size: 19px; font-weight: 700; color: var(--c-head); margin-bottom: 12px; }
.adv-card p { font-size: 15px; color: var(--c-body); }

/* ---------- 服务卡片 ---------- */
.svc-card {
  display: flex; flex-direction: column; overflow: hidden;
  background: var(--card-bg); border: 1px solid var(--card-line); border-radius: var(--radius);
  transition: all .35s ease;
}
.svc-card:hover { transform: translateY(-6px); border-color: rgba(47, 212, 168, .5); box-shadow: 0 22px 54px rgba(0, 0, 0, .32); }
.svc-media { position: relative; aspect-ratio: 4 / 3; overflow: hidden; }
.svc-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s ease; }
.svc-media::after { content: ""; position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(6, 24, 28, .55), transparent 55%); }
.svc-card:hover .svc-media img { transform: scale(1.06); }
.svc-body { padding: 28px 26px 32px; flex: 1; display: flex; flex-direction: column; }
.svc-body h3 { font-size: 19px; font-weight: 700; color: var(--c-head); margin-bottom: 12px; }
.svc-body p { font-size: 15px; color: var(--c-body); flex: 1; }
.svc-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.svc-tags span {
  font-size: 12px; color: var(--mint-2); padding: 4px 12px; border-radius: 999px;
  border: 1px solid rgba(47, 212, 168, .3); background: rgba(47, 212, 168, .07);
}
.section-light .svc-tags span { color: #0d8a68; background: rgba(47, 212, 168, .1); }
.svc-link { margin-top: 20px; font-size: 14px; font-weight: 600; letter-spacing: .5px; color: var(--mint-2); }
.section-light .svc-link { color: #0d8a68; }
.svc-link::after { content: " →"; }

/* 无图服务清单 */
.svc-list li { display: flex; gap: 18px; padding: 26px 0; border-bottom: 1px dashed var(--card-line); }
.svc-list li:last-child { border-bottom: 0; }
.svc-list .idx { min-width: 42px; font-size: 15px; font-weight: 800; letter-spacing: 1px; color: var(--mint); }
.svc-list h4 { font-size: 17px; color: var(--c-head); margin-bottom: 6px; }
.svc-list p { font-size: 15px; color: var(--c-body); }

/* ---------- 数据条 ---------- */
.stats-bar { background: var(--ink-2); padding: 64px 0; --card-line: var(--line); }
.stats-bar .grid-4 { text-align: center; gap: 20px; }
.stats-bar strong { display: block; font-size: 46px; font-weight: 800; color: var(--mint-2); line-height: 1.15; }
.stats-bar span { font-size: 14px; color: rgba(255, 255, 255, .6); letter-spacing: 1px; }

/* ---------- 关于 ---------- */
.about-media { position: relative; }
.about-media img { width: 100%; border-radius: var(--radius); }
.about-media .badge {
  position: absolute; right: -16px; bottom: -16px; padding: 20px 24px; text-align: center;
  background: var(--ink-2); color: #fff; border: 1px solid rgba(47, 212, 168, .4);
  border-radius: 14px; box-shadow: 0 18px 40px rgba(0, 0, 0, .3);
}
.about-media .badge strong { display: block; font-size: 28px; font-weight: 800; color: var(--mint-2); }
.about-media .badge span { font-size: 12px; color: rgba(255, 255, 255, .65); letter-spacing: 1px; }
.about-text h2 { font-size: 36px; font-weight: 800; line-height: 1.32; color: var(--c-head); margin-bottom: 18px; }
.about-text p { color: var(--c-body); margin-bottom: 16px; }
.about-points { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; margin-top: 24px; }
.about-points li { display: flex; gap: 10px; font-size: 15px; color: var(--c-head); }
.about-points li::before {
  content: ""; width: 7px; height: 7px; margin-top: 10px; flex: none; border-radius: 50%;
  background: linear-gradient(135deg, var(--mint), var(--mint-2));
}

/* 时间轴 */
.timeline { position: relative; padding-left: 30px; }
.timeline::before { content: ""; position: absolute; left: 6px; top: 8px; bottom: 8px; width: 1px;
  background: linear-gradient(180deg, var(--mint), transparent); }
.timeline li { position: relative; padding-bottom: 34px; }
.timeline li:last-child { padding-bottom: 0; }
.timeline li::before {
  content: ""; position: absolute; left: -30px; top: 8px; width: 13px; height: 13px; border-radius: 50%;
  background: var(--ink); border: 2px solid var(--mint); box-shadow: 0 0 0 4px rgba(47, 212, 168, .12);
}
.section-light .timeline li::before { background: var(--light); }
.timeline .year { font-size: 14px; font-weight: 700; letter-spacing: 1px; color: var(--mint); }
.timeline h4 { font-size: 17px; color: var(--c-head); margin: 6px 0; }
.timeline p { font-size: 15px; color: var(--c-body); }

/* ---------- 团队 ---------- */
.team-card { padding: 32px 28px; background: var(--card-bg); border: 1px solid var(--card-line);
  border-radius: var(--radius); transition: all .35s ease; }
.team-card:hover { transform: translateY(-6px); border-color: rgba(47, 212, 168, .45); }
.team-card .avatar {
  width: 58px; height: 58px; margin-bottom: 18px; border-radius: 16px; display: grid; place-items: center;
  font-size: 20px; font-weight: 800; color: #04211d; background: linear-gradient(135deg, var(--mint), var(--mint-2));
}
.team-card h4 { font-size: 18px; color: var(--c-head); }
.team-card .role { margin: 6px 0 12px; font-size: 12px; letter-spacing: 1.5px; text-transform: uppercase; color: var(--mint); }
.team-card p { font-size: 15px; color: var(--c-body); }

/* ---------- 流程 ---------- */
.steps { counter-reset: step; display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.step { counter-increment: step; position: relative; padding: 32px 26px;
  background: var(--card-bg); border: 1px solid var(--card-line); border-radius: var(--radius); transition: all .35s ease; }
.step:hover { transform: translateY(-6px); border-color: rgba(47, 212, 168, .45); }
.step::before { content: "0" counter(step); display: block; margin-bottom: 14px;
  font-size: 15px; font-weight: 800; letter-spacing: 1px; color: var(--mint); }
.step h4 { font-size: 17px; color: var(--c-head); margin-bottom: 10px; }
.step p { font-size: 15px; color: var(--c-body); }

/* ---------- CTA ---------- */
.cta {
  position: relative; overflow: hidden; text-align: center; color: #fff;
  background: linear-gradient(120deg, #0a2b2e, #0f3b3d 55%, #06181c);
}
.cta .glow { width: 560px; height: 560px; left: 50%; top: -42%; transform: translateX(-50%); z-index: 1;
  background: radial-gradient(circle, rgba(47, 212, 168, .3), transparent 70%); }
.cta h2 { position: relative; z-index: 2; font-size: 38px; font-weight: 800; letter-spacing: .5px; color: #fff; margin-bottom: 16px; }
.cta p { position: relative; z-index: 2; max-width: 640px; margin: 0 auto 32px; color: rgba(255, 255, 255, .72); }
.cta .btn-row { position: relative; z-index: 2; display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }

/* ---------- 联系 ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.12fr; gap: 44px; align-items: start; }
.info-card { padding: 32px 28px; margin-bottom: 20px;
  background: var(--card-bg); border: 1px solid var(--card-line); border-radius: var(--radius); }
.info-item { display: flex; gap: 16px; padding: 16px 0; border-bottom: 1px dashed var(--card-line); }
.info-item:last-child { border-bottom: 0; padding-bottom: 0; }
.info-item:first-of-type { padding-top: 0; }
.info-ico { width: 44px; height: 44px; flex: none; border-radius: var(--radius-sm); display: grid; place-items: center;
  color: var(--mint); background: rgba(47, 212, 168, .12); border: 1px solid rgba(47, 212, 168, .28); }
.info-ico svg { width: 20px; height: 20px; }
.info-item h4 { font-size: 13px; font-weight: 500; letter-spacing: 1px; color: var(--c-body); }
.info-item p { font-size: 17px; font-weight: 700; color: var(--c-head); }
.info-item small { font-size: 13px; color: var(--c-body); }

.form-card { padding: 38px 34px; background: var(--card-bg); border: 1px solid var(--card-line);
  border-radius: var(--radius); box-shadow: var(--shadow); }
.form-card h3 { font-size: 24px; font-weight: 800; color: var(--c-head); margin-bottom: 8px; }
.form-card .hint { font-size: 14px; color: var(--c-body); margin-bottom: 26px; }
.field { margin-bottom: 18px; }
.field label { display: block; font-size: 14px; color: var(--c-body); margin-bottom: 8px; }
.field input, .field select, .field textarea {
  width: 100%; padding: 13px 14px; border: 1px solid var(--input-line); border-radius: var(--radius-sm);
  background: var(--input-bg); color: var(--input-color);
  transition: border-color .25s ease, box-shadow .25s ease;
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--mint); box-shadow: 0 0 0 3px rgba(47, 212, 168, .18);
}
.field textarea { min-height: 120px; resize: vertical; }
.form-row { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.form-note { font-size: 13px; color: var(--c-body); margin-top: 14px; }
.form-error { display: none; margin-top: 14px; font-size: 13px; font-weight: 600; color: #e07a6a; }
.form-success { display: none; margin-top: 14px; font-size: 14px; font-weight: 600; color: var(--mint-2); }
.section-light .form-success { color: #0d8a68; }

.map-box { margin-top: 20px; min-height: 200px; display: grid; place-items: center; text-align: center; padding: 28px;
  border: 1px solid var(--card-line); border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(47, 212, 168, .1), rgba(255, 255, 255, .02)); }
.section-light .map-box { background: linear-gradient(135deg, rgba(47, 212, 168, .14), rgba(6, 24, 28, .03)); }
.map-box strong { display: block; font-size: 20px; font-weight: 800; color: var(--c-head); }
.map-box span { font-size: 14px; color: var(--c-body); }

/* ---------- 页脚 ---------- */
.footer { position: relative; padding: 68px 0 0; font-size: 14px; color: rgba(255, 255, 255, .62); background: #041013; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.15fr; gap: 40px; }
.footer h4 { color: #fff; font-size: 15px; letter-spacing: 1px; margin-bottom: 20px; }
.footer h4::after { content: ""; display: block; width: 26px; height: 2px; margin-top: 10px;
  background: linear-gradient(90deg, var(--mint), var(--mint-2)); }
.footer .logo { margin-bottom: 18px; }
.footer p { line-height: 1.9; }
.footer li { margin-bottom: 10px; }
.footer li a:hover { color: var(--mint-2); }
.footer-company { color: rgba(255, 255, 255, .86); font-weight: 700; margin-bottom: 8px; }
.footer-bottom { display: flex; flex-wrap: wrap; gap: 10px 26px; justify-content: space-between;
  margin-top: 52px; padding: 22px 0; border-top: 1px solid rgba(255, 255, 255, .09);
  font-size: 13px; color: rgba(255, 255, 255, .5); }
.footer-bottom a:hover { color: var(--mint-2); }

/* ---------- 回到顶部 ---------- */
.to-top {
  position: fixed; right: 22px; bottom: 24px; z-index: 900; width: 46px; height: 46px;
  display: grid; place-items: center; font-size: 18px; cursor: pointer;
  border: 1px solid rgba(47, 212, 168, .5); border-radius: 14px;
  background: var(--ink-2); color: var(--mint-2);
  opacity: 0; visibility: hidden; transition: all .3s ease;
}
.to-top.show { opacity: 1; visibility: visible; }
.to-top:hover { background: linear-gradient(135deg, var(--mint), var(--mint-2)); color: #04211d; }

/* ---------- 滚动淡入 ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: none; }

/* =========================================================
   响应式
   ========================================================= */
@media (max-width: 1080px) {
  .nav { gap: 22px; }
  .header-tel { display: none; }
  .hero h1 { font-size: 50px; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 860px) {
  :root { --header-h: 66px; }
  section { padding: 70px 0; }

  .nav-toggle { display: flex; }
  .nav {
    position: fixed; top: var(--header-h); left: 0; right: 0; z-index: 998;
    flex-direction: column; gap: 0; padding: 10px 24px 24px;
    background: rgba(6, 24, 28, .98);
    border-bottom: 1px solid rgba(255, 255, 255, .1);
    transform: translateY(-140%); transition: transform .35s ease;
  }
  .nav.open { transform: translateY(0); }
  .nav a { width: 100%; padding: 15px 0; font-size: 16px; border-bottom: 1px solid rgba(255, 255, 255, .08); }
  .nav a::after { display: none; }
  .header-cta .btn { display: none; }

  .hero { min-height: auto; padding: calc(var(--header-h) + 66px) 0 70px; }
  .hero h1 { font-size: 38px; letter-spacing: .5px; }
  .hero p.lead { font-size: 16px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 24px 0; margin-top: 44px; }
  .hero-stats strong { font-size: 28px; }

  .sec-title { font-size: 30px; }
  .page-hero { padding: calc(var(--header-h) + 60px) 0 60px; }
  .page-hero h1 { font-size: 32px; }
  .grid-3, .grid-2, .contact-grid { grid-template-columns: 1fr; }
  .grid-2 { gap: 34px; }
  .about-text h2 { font-size: 28px; }
  .about-media .badge { right: 12px; bottom: -14px; padding: 16px 20px; }
  .stats-bar strong { font-size: 34px; }
  .cta h2 { font-size: 28px; }
  .form-row { grid-template-columns: 1fr; }
  .form-card { padding: 28px 22px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer { padding-top: 48px; }
  .to-top { right: 14px; bottom: 16px; }
}

@media (max-width: 560px) {
  .container { padding: 0 18px; }
  .hero h1 { font-size: 30px; }
  .grid-4, .steps, .about-points { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { width: 100%; }
  .sec-title { font-size: 26px; }
  .cta h2 { font-size: 24px; }
  .logo-text { font-size: 17px; letter-spacing: 1.5px; }
  .footer-bottom { flex-direction: column; gap: 8px; }
}