/* =========================================================
   免费模式 mianfeimoshi.com
   风格：活力营销风 —— 近黑底 + 橙红渐变 + 大字重 + 斜切色块斜纹
   ========================================================= */

/* ---------- 变量 ---------- */
:root {
  --ink: #15171c;
  --ink-2: #1e2128;
  --fire: #ff4d1f;
  --fire-2: #ff2e55;
  --amber: #ffb020;
  --light: #fff7f2;
  --text: #22242b;
  --muted: #6b6f7a;
  --line: rgba(21, 23, 28, .1);
  --grad: linear-gradient(120deg, #ff6a1f 0%, #ff4d1f 50%, #ff2e4d 100%);
  --radius: 14px;
  --radius-sm: 10px;
  --shadow: 0 20px 48px rgba(21, 23, 28, .14);
  --glow: 0 14px 30px rgba(255, 77, 31, .35);
  --header-h: 74px;
  --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);
  color: var(--text);
  background: var(--light);
  font-size: 16px;
  line-height: 1.75;
  overflow-x: hidden;
}

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: 1220px; margin: 0 auto; padding: 0 24px; position: relative; z-index: 2; }

/* ---------- 排版 ---------- */
.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 13px; font-weight: 800; letter-spacing: 2.5px; text-transform: uppercase;
  color: var(--fire); margin-bottom: 16px;
}
.eyebrow::before { content: ""; width: 26px; height: 6px; border-radius: 3px; background: var(--grad); }

.sec-title {
  font-size: 46px; line-height: 1.18; font-weight: 900; letter-spacing: -1px; color: var(--ink);
}
.sec-title .fire {
  background: var(--grad); -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.sec-title.on-dark { color: #fff; }
.sec-desc { color: var(--muted); margin-top: 16px; max-width: 660px; font-size: 16.5px; }
.sec-head { margin-bottom: 52px; }
.sec-head.center { text-align: center; }
.sec-head.center .eyebrow { justify-content: center; }
.sec-head.center .sec-desc { margin-left: auto; margin-right: auto; }
.sec-head.light .sec-title { color: #fff; }
.sec-head.light .sec-desc { color: rgba(255, 255, 255, .62); }

section { position: relative; padding: 92px 0; }
.section-dark { background: var(--ink); color: rgba(255, 255, 255, .82); }
.section-dark .sec-desc { color: rgba(255, 255, 255, .62); }

/* ---------- 纯 CSS 装饰：斜纹 / 斜切色块 ---------- */
.stripe {
  position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background: repeating-linear-gradient(115deg, transparent 0 16px, rgba(255, 255, 255, .045) 16px 22px);
}
.stripe-soft {
  background: repeating-linear-gradient(115deg, transparent 0 16px, rgba(21, 23, 28, .035) 16px 22px);
}
.slash {
  position: absolute; top: 0; right: 0; width: 42%; height: 100%; z-index: 0; pointer-events: none;
  background: var(--grad); opacity: .13; clip-path: polygon(38% 0, 100% 0, 100% 100%, 0 100%);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  padding: 15px 34px; border: 1px solid transparent; border-radius: 999px;
  font-size: 16px; font-weight: 800; letter-spacing: .5px; cursor: pointer;
  transition: transform .25s ease, box-shadow .25s ease, background .25s ease, color .25s ease;
  white-space: nowrap;
}
.btn-fire { background: var(--grad); color: #fff; box-shadow: var(--glow); }
.btn-fire:hover { transform: translateY(-3px); box-shadow: 0 20px 40px rgba(255, 46, 77, .45); }
.btn-ghost { border-color: rgba(255, 255, 255, .45); color: #fff; background: rgba(255, 255, 255, .04); }
.btn-ghost:hover { background: rgba(255, 255, 255, .14); transform: translateY(-3px); }
.btn-dark { border-color: rgba(21, 23, 28, .22); color: var(--ink); background: #fff; }
.btn-dark:hover { background: var(--ink); color: #fff; transform: translateY(-3px); }
.btn-block { width: 100%; }

/* 胶囊标签 */
.pill {
  display: inline-flex; align-items: center; gap: 7px; padding: 6px 14px; border-radius: 999px;
  font-size: 13px; font-weight: 700; color: var(--fire);
  background: rgba(255, 77, 31, .1); border: 1px solid rgba(255, 77, 31, .22);
}

/* ---------- 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(21, 23, 28, .9); backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, .08);
  transition: background .3s ease, box-shadow .3s ease, height .3s ease;
}
.header.scrolled { background: rgba(21, 23, 28, .98); box-shadow: 0 10px 34px rgba(0, 0, 0, .35); }
.header .container { display: flex; align-items: center; justify-content: space-between; gap: 18px; }

.logo { display: flex; align-items: center; gap: 12px; }
.logo-mark {
  width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center;
  background: var(--grad); color: #fff; font-size: 20px; font-weight: 900; box-shadow: var(--glow);
}
.logo-text { color: #fff; font-size: 21px; font-weight: 900; letter-spacing: 2px; line-height: 1.15; }
.logo-sub { display: block; font-size: 10px; letter-spacing: 2.5px; color: var(--amber); font-weight: 700; }

.nav { display: flex; align-items: center; gap: 34px; }
.nav a {
  color: rgba(255, 255, 255, .78); font-size: 15.5px; font-weight: 600;
  position: relative; padding: 6px 0; transition: color .25s ease;
}
.nav a::after {
  content: ""; position: absolute; left: 0; bottom: -2px; width: 0; height: 3px;
  border-radius: 2px; background: var(--grad); 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(--amber); font-size: 14px; font-weight: 700; letter-spacing: .5px; }
.header-cta .btn { padding: 11px 24px; font-size: 14.5px; }

.nav-toggle {
  display: none; width: 44px; height: 44px; background: transparent;
  border: 1px solid rgba(255, 255, 255, .25); border-radius: 12px; cursor: pointer;
  flex-direction: column; align-items: center; justify-content: center; gap: 5px;
}
.nav-toggle span { display: block; width: 20px; height: 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); }

/* ---------- 悬浮报名按钮 ---------- */
.float-cta {
  position: fixed; right: 22px; bottom: 88px; z-index: 900;
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 22px; border-radius: 999px; background: var(--grad); color: #fff;
  font-weight: 800; font-size: 15px; box-shadow: var(--glow);
  animation: floatPulse 2.6s ease-in-out infinite;
}
.float-cta:hover { transform: scale(1.05); }
@keyframes floatPulse {
  0%, 100% { box-shadow: 0 14px 30px rgba(255, 77, 31, .35); }
  50% { box-shadow: 0 18px 44px rgba(255, 46, 77, .6); }
}

/* ---------- 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: .5; }
.hero::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(105deg, rgba(15, 17, 22, .95) 0%, rgba(21, 23, 28, .78) 42%, rgba(255, 77, 31, .28) 100%);
}
.hero .container { padding-top: var(--header-h); }
.hero-inner { max-width: 800px; }
.hero h1 { font-size: 66px; line-height: 1.14; font-weight: 900; letter-spacing: -1.5px; margin: 16px 0 22px; }
.hero h1 .fire {
  background: linear-gradient(120deg, #ffb020, #ff4d1f 60%, #ff2e4d);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.hero p.lead { font-size: 18.5px; color: rgba(255, 255, 255, .8); max-width: 640px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-top: 38px; }
.hero-stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; margin-top: 64px;
  border-top: 1px solid rgba(255, 255, 255, .16); padding-top: 28px;
}
.hero-stats div { padding-right: 18px; }
.hero-stats strong {
  display: block; font-size: 40px; font-weight: 900; line-height: 1.1; letter-spacing: -1px;
  background: linear-gradient(120deg, #ffb020, #ff4d1f);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.hero-stats span { font-size: 13.5px; color: rgba(255, 255, 255, .6); letter-spacing: .5px; }

/* 内页首屏 */
.page-hero {
  position: relative; padding: calc(var(--header-h) + 84px) 0 84px;
  background: var(--ink); color: #fff; overflow: hidden;
}
.page-hero img {
  position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: .34;
}
.page-hero::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(95deg, rgba(15, 17, 22, .95), rgba(255, 77, 31, .22));
}
.page-hero h1 { font-size: 50px; font-weight: 900; letter-spacing: -1px; margin: 6px 0 14px; }
.page-hero p { color: rgba(255, 255, 255, .75); max-width: 720px; }
.crumb { font-size: 13.5px; color: rgba(255, 255, 255, .5); margin-bottom: 14px; letter-spacing: .5px; }
.crumb a:hover { color: var(--amber); }

/* ---------- 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; }

/* ---------- 免费模式逻辑流程 ---------- */
.flow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.flow-node {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 30px 24px; position: relative; box-shadow: var(--shadow);
}
.flow-node .num {
  width: 46px; height: 46px; border-radius: 12px; background: var(--grad); color: #fff;
  font-weight: 900; font-size: 19px; display: grid; place-items: center; margin-bottom: 16px;
  box-shadow: var(--glow);
}
.flow-node h3 { font-size: 19px; font-weight: 800; color: var(--ink); margin-bottom: 8px; }
.flow-node p { font-size: 15px; color: var(--muted); }
.flow .flow-node:not(:last-child)::after {
  content: ""; position: absolute; top: 52px; right: -16px; width: 10px; height: 10px;
  border-top: 3px solid var(--fire); border-right: 3px solid var(--fire); transform: rotate(45deg);
}

/* 高亮色块 */
.hl-band {
  margin-top: 44px; border-radius: var(--radius); background: var(--ink); color: #fff;
  padding: 34px 38px; display: flex; gap: 28px; align-items: center; flex-wrap: wrap;
  position: relative; overflow: hidden;
}
.hl-band > div { flex: 1; min-width: 240px; }
.hl-band strong { font-size: 23px; font-weight: 900; color: #fff; }
.hl-band p { color: rgba(255, 255, 255, .72); font-size: 15px; margin-top: 8px; }
.hl-mark {
  font-size: 42px; font-weight: 900; line-height: 1.05; letter-spacing: -1px; text-align: center;
  background: linear-gradient(120deg, #ffb020, #ff4d1f);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}

/* ---------- 服务卡片 ---------- */
.svc-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden;
  display: flex; flex-direction: column; transition: transform .3s ease, box-shadow .3s ease;
}
.svc-card:hover { transform: translateY(-8px); box-shadow: var(--shadow); }
.svc-media { position: relative; aspect-ratio: 1 / 1; overflow: hidden; }
.svc-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s ease; }
.svc-card:hover .svc-media img { transform: scale(1.07); }
.svc-media .svc-badge {
  position: absolute; left: 14px; top: 14px; padding: 5px 13px; border-radius: 999px;
  background: var(--grad); color: #fff; font-size: 12px; font-weight: 800; letter-spacing: .5px;
}
.svc-body { padding: 26px 26px 30px; flex: 1; display: flex; flex-direction: column; }
.svc-body h3 { font-size: 20px; font-weight: 800; color: var(--ink); margin-bottom: 10px; }
.svc-body p { color: var(--muted); font-size: 15px; flex: 1; }
.svc-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.svc-tags span {
  font-size: 12px; color: var(--fire); background: rgba(255, 77, 31, .09);
  padding: 4px 12px; border-radius: 999px; font-weight: 600;
}
.svc-link { margin-top: 20px; color: var(--ink); font-weight: 800; font-size: 14.5px; letter-spacing: .5px; }
.svc-link::after { content: " →"; color: var(--fire); }

/* 无图服务清单 */
.svc-list li { display: flex; gap: 18px; padding: 24px 0; border-bottom: 1px dashed var(--line); }
.svc-list .idx {
  font-size: 20px; font-weight: 900; min-width: 46px;
  background: var(--grad); -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.svc-list h4 { font-size: 17px; font-weight: 800; color: var(--ink); margin-bottom: 6px; }
.svc-list p { color: var(--muted); font-size: 15px; }
.section-dark .svc-list li { border-color: rgba(255, 255, 255, .14); }
.section-dark .svc-list h4 { color: #fff; }
.section-dark .svc-list p { color: rgba(255, 255, 255, .62); }

/* ---------- 数据条 ---------- */
.stats-bar { background: var(--ink-2); color: #fff; padding: 64px 0; overflow: hidden; }
.stats-bar .grid-4 { text-align: center; gap: 20px; }
.stats-bar strong {
  display: block; font-size: 52px; font-weight: 900; line-height: 1.05; letter-spacing: -1.5px;
  background: linear-gradient(120deg, #ffb020, #ff4d1f);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.stats-bar span { font-size: 14px; color: rgba(255, 255, 255, .6); letter-spacing: 1px; }

/* ---------- 关于 ---------- */
.about-media { position: relative; }
.about-media img { border-radius: var(--radius); box-shadow: var(--shadow); width: 100%; }
.about-media .badge {
  position: absolute; right: -16px; bottom: -16px; background: var(--grad); color: #fff;
  padding: 20px 24px; border-radius: var(--radius); text-align: center; box-shadow: var(--glow);
}
.about-media .badge strong { display: block; font-size: 30px; font-weight: 900; line-height: 1.1; }
.about-media .badge span { font-size: 12px; opacity: .92; }

.about-text h2 { font-size: 38px; font-weight: 900; line-height: 1.3; color: var(--ink); margin-bottom: 18px; letter-spacing: -.5px; }
.about-text p { color: var(--muted); margin-bottom: 14px; }
.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; font-weight: 600; color: var(--text); }
.about-points li::before {
  content: ""; width: 8px; height: 8px; margin-top: 9px; border-radius: 2px;
  background: var(--grad); flex: none;
}

/* ---------- 时间轴 ---------- */
.timeline { position: relative; padding-left: 30px; }
.timeline::before {
  content: ""; position: absolute; left: 6px; top: 8px; bottom: 8px; width: 3px;
  border-radius: 2px; background: var(--grad); opacity: .35;
}
.timeline li { position: relative; padding-bottom: 32px; }
.timeline li::before {
  content: ""; position: absolute; left: -30px; top: 7px; width: 15px; height: 15px;
  border-radius: 50%; background: var(--grad); box-shadow: 0 0 0 4px rgba(255, 77, 31, .14);
}
.timeline .year { font-size: 17px; font-weight: 900; color: var(--fire); letter-spacing: .5px; }
.timeline h4 { font-size: 17px; font-weight: 800; color: var(--ink); margin: 6px 0; }
.timeline p { color: var(--muted); font-size: 15px; }

/* ---------- 团队 ---------- */
.team-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 32px 26px; transition: transform .3s ease, box-shadow .3s ease;
}
.team-card:hover { transform: translateY(-8px); box-shadow: var(--shadow); }
.team-card .avatar {
  width: 60px; height: 60px; border-radius: 16px; display: grid; place-items: center;
  font-size: 22px; font-weight: 900; color: #fff; background: var(--grad);
  margin-bottom: 16px; box-shadow: var(--glow);
}
.team-card h4 { font-size: 19px; font-weight: 800; color: var(--ink); }
.team-card .role { font-size: 12.5px; color: var(--fire); font-weight: 800; letter-spacing: 1.5px; margin: 5px 0 12px; }
.team-card p { font-size: 15px; color: var(--muted); }

/* ---------- 流程 ---------- */
.steps { counter-reset: step; display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.step {
  counter-increment: step; background: #fff; border: 1px solid var(--line);
  border-radius: var(--radius); padding: 32px 24px;
  transition: transform .3s ease, box-shadow .3s ease;
}
.step:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.step::before {
  content: "0" counter(step); font-size: 30px; font-weight: 900; display: block; margin-bottom: 12px;
  background: var(--grad); -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.step h4 { font-size: 18px; font-weight: 800; color: var(--ink); margin-bottom: 8px; }
.step p { font-size: 15px; color: var(--muted); }

/* ---------- 常见问题 ---------- */
.faq { display: grid; gap: 16px; max-width: 940px; margin: 0 auto; }
.faq-item {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px 28px 26px 72px; position: relative;
}
.faq-item .q {
  position: absolute; left: 26px; top: 26px; width: 30px; height: 30px; border-radius: 10px;
  background: var(--grad); color: #fff; font-weight: 900; font-size: 14px;
  display: grid; place-items: center;
}
.faq-item h4 { font-size: 18px; font-weight: 800; color: var(--ink); margin-bottom: 8px; }
.faq-item p { color: var(--muted); font-size: 15px; }

/* ---------- CTA ---------- */
.cta { background: var(--ink); color: #fff; text-align: center; overflow: hidden; }
.cta h2 { font-size: 42px; font-weight: 900; letter-spacing: -1px; margin-bottom: 16px; }
.cta p { color: rgba(255, 255, 255, .7); margin: 0 auto 32px; max-width: 640px; }
.cta .btn-row { 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 {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 32px 28px; margin-bottom: 20px; box-shadow: var(--shadow);
}
.info-item { display: flex; gap: 16px; padding: 15px 0; border-bottom: 1px dashed var(--line); }
.info-item:last-child { border-bottom: 0; padding-bottom: 0; }
.info-ico {
  width: 44px; height: 44px; flex: none; border-radius: 12px; display: grid; place-items: center;
  background: rgba(255, 77, 31, .1); color: var(--fire);
}
.info-ico svg { width: 22px; height: 22px; }
.info-item h4 { font-size: 13.5px; color: var(--muted); font-weight: 700; letter-spacing: 1px; }
.info-item p { font-size: 17px; font-weight: 800; color: var(--ink); }
.info-item small { color: var(--muted); font-size: 13px; }

.form-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 38px 34px; box-shadow: var(--shadow);
}
.form-card h3 { font-size: 26px; font-weight: 900; color: var(--ink); margin-bottom: 8px; }
.form-card .hint { color: var(--muted); font-size: 14.5px; margin-bottom: 26px; }
.field { margin-bottom: 18px; }
.field label { display: block; font-size: 14px; font-weight: 700; color: var(--text); margin-bottom: 8px; }
.field input, .field select, .field textarea {
  width: 100%; padding: 13px 15px; border: 1px solid var(--line); border-radius: var(--radius-sm);
  background: #fbf8f6; color: var(--text); font-size: 16px;
  transition: border-color .25s ease, box-shadow .25s ease, background .25s ease;
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--fire); background: #fff; box-shadow: 0 0 0 4px rgba(255, 77, 31, .12);
}
.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(--muted); margin-top: 14px; }
.field-error { display: none; color: #e0243a; font-size: 13px; font-weight: 600; margin-top: 6px; }
.form-success {
  display: none; margin-top: 16px; padding: 14px 16px; border-radius: var(--radius-sm);
  background: rgba(255, 176, 32, .14); border: 1px solid rgba(255, 176, 32, .38);
  color: #8a5a00; font-weight: 700; font-size: 14.5px;
}

.map-box {
  margin-top: 20px; border: 1px solid var(--line); border-radius: var(--radius);
  background: linear-gradient(135deg, #ffeee4, #ffe3d6);
  min-height: 200px; display: grid; place-items: center; text-align: center; padding: 30px;
  position: relative; overflow: hidden;
}
.map-box strong { font-size: 20px; font-weight: 900; color: var(--ink); display: block; }
.map-box span { color: var(--muted); font-size: 14px; }

/* ---------- 页脚 ---------- */
.footer { background: #0f1116; color: rgba(255, 255, 255, .62); padding: 70px 0 0; font-size: 14px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.15fr; gap: 36px; }
.footer h4 { color: #fff; font-size: 16px; font-weight: 800; margin-bottom: 18px; letter-spacing: .5px; }
.footer h4::after { content: ""; display: block; width: 30px; height: 3px; border-radius: 2px; background: var(--grad); margin-top: 10px; }
.footer .logo { margin-bottom: 16px; }
.footer p { line-height: 1.9; }
.footer li { margin-bottom: 10px; }
.footer li a:hover { color: var(--amber); }
.footer-company { color: rgba(255, 255, 255, .88); font-weight: 800; margin-bottom: 8px; }
.footer-bottom {
  margin-top: 52px; border-top: 1px solid rgba(255, 255, 255, .1); padding: 22px 0;
  display: flex; flex-wrap: wrap; gap: 8px 24px; justify-content: space-between;
  font-size: 13px; color: rgba(255, 255, 255, .5);
}
.footer-bottom a:hover { color: var(--amber); }

/* ---------- 回到顶部 ---------- */
.to-top {
  position: fixed; right: 22px; bottom: 24px; width: 48px; height: 48px; border-radius: 14px;
  border: 1px solid rgba(255, 77, 31, .5); background: var(--ink); color: #fff; cursor: pointer;
  display: grid; place-items: center; font-size: 18px; z-index: 900;
  opacity: 0; visibility: hidden; transition: all .3s ease;
}
.to-top.show { opacity: 1; visibility: visible; }
.to-top:hover { background: var(--grad); border-color: transparent; }

/* ---------- 滚动淡入 ---------- */
.reveal { opacity: 0; transform: translateY(26px); 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: 52px; }
  .sec-title { font-size: 38px; }
  .grid-4, .flow, .steps { grid-template-columns: repeat(2, 1fr); }
  .flow .flow-node:not(:last-child)::after { display: none; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 860px) {
  :root { --header-h: 66px; }
  section { padding: 64px 0; }
  .nav-toggle { display: flex; }
  .nav {
    position: fixed; top: var(--header-h); left: 0; right: 0; z-index: 998;
    background: rgba(15, 17, 22, .99); flex-direction: column; gap: 0;
    padding: 10px 22px 24px; 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; border-bottom: 1px solid rgba(255, 255, 255, .08); font-size: 16.5px; }
  .nav a::after { display: none; }
  .header-cta .btn { display: none; }

  .hero { min-height: auto; padding: calc(var(--header-h) + 64px) 0 64px; }
  .hero h1 { font-size: 38px; letter-spacing: -.5px; }
  .hero p.lead { font-size: 16.5px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 22px 0; margin-top: 44px; }
  .hero-stats strong { font-size: 32px; }

  .sec-title { font-size: 30px; }
  .page-hero { padding: calc(var(--header-h) + 52px) 0 52px; }
  .page-hero h1 { font-size: 32px; }
  .grid-3, .grid-2, .contact-grid { grid-template-columns: 1fr; }
  .grid-2 { gap: 32px; }
  .about-text h2 { font-size: 30px; }
  .about-media .badge { right: 12px; bottom: -12px; padding: 15px 18px; }
  .stats-bar strong { font-size: 38px; }
  .cta h2 { font-size: 30px; }
  .form-row { grid-template-columns: 1fr; }
  .form-card { padding: 28px 22px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer { padding-top: 50px; }
  .float-cta { right: 14px; bottom: 74px; padding: 11px 18px; font-size: 14px; }
  .to-top { right: 14px; bottom: 16px; width: 44px; height: 44px; }
}

@media (max-width: 560px) {
  .container { padding: 0 18px; }
  .hero h1 { font-size: 30px; }
  .grid-4, .steps, .flow, .about-points { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { width: 100%; }
  .sec-title { font-size: 26px; }
  .logo-text { font-size: 18px; letter-spacing: 1.5px; }
  .logo-mark { width: 40px; height: 40px; font-size: 18px; }
  .footer-bottom { flex-direction: column; gap: 8px; }
  .hl-band { padding: 26px 22px; gap: 18px; }
  .hl-mark { font-size: 34px; }
  .faq-item { padding: 22px 20px 22px 62px; }
  .faq-item .q { left: 20px; top: 22px; }
}