/* ============================================================
   品学教育 - 官方网站样式表
   配色：清新蓝绿（教育行业）
   ============================================================ */

/* ---------- 1. 变量与基础 ---------- */
:root {
  --brand: #0f9b8e;
  --brand-dark: #0b7a70;
  --brand-deep: #075e57;
  --brand-light: #e6f6f4;
  --brand-lighter: #f2fbfa;
  --accent: #2f7dd1;
  --accent-light: #eaf3fc;
  --orange: #f59e42;

  --ink: #16292e;
  --ink-2: #33474e;
  --muted: #6b8189;
  --muted-2: #93a5ab;
  --line: #e3ecee;
  --bg: #ffffff;
  --bg-soft: #f7fafb;

  --radius: 14px;
  --radius-lg: 20px;
  --shadow-sm: 0 2px 10px rgba(15, 60, 60, .06);
  --shadow: 0 8px 28px rgba(15, 60, 60, .09);
  --shadow-lg: 0 18px 50px rgba(15, 60, 60, .13);

  --maxw: 1200px;
  --nav-h: 72px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

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

/* ---------- 2. 通用组件 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 46px;
  padding: 0 26px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: all .25s ease;
  white-space: nowrap;
}
.btn-primary {
  background: var(--brand);
  color: #fff;
  box-shadow: 0 6px 18px rgba(15, 155, 142, .28);
}
.btn-primary:hover { background: var(--brand-dark); transform: translateY(-2px); box-shadow: 0 10px 24px rgba(15, 155, 142, .34); }
.btn-outline { border-color: var(--brand); color: var(--brand); background: #fff; }
.btn-outline:hover { background: var(--brand-light); transform: translateY(-2px); }
.btn-ghost { border-color: rgba(255,255,255,.75); color: #fff; }
.btn-ghost:hover { background: rgba(255,255,255,.15); }
.btn-lg { height: 54px; padding: 0 34px; font-size: 16px; }
.btn-block { width: 100%; }

.tag {
  display: inline-block;
  padding: 3px 12px;
  border-radius: 999px;
  font-size: 12.5px;
  font-weight: 600;
  background: var(--brand-light);
  color: var(--brand-dark);
}
.tag-blue { background: var(--accent-light); color: #2166b0; }
.tag-orange { background: #fef3e6; color: #b8711a; }

/* 区块标题 */
.sec { padding: 92px 0; }
.sec-soft { background: var(--bg-soft); }
.sec-head { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.sec-head .eyebrow {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--brand);
  font-weight: 700;
  margin-bottom: 12px;
}
.sec-head h2 { font-size: 34px; line-height: 1.35; margin-bottom: 16px; letter-spacing: -.5px; }
.sec-head p { color: var(--muted); font-size: 16.5px; }
.sec-head.left { text-align: left; margin-left: 0; }

.divider { width: 56px; height: 4px; border-radius: 2px; background: var(--brand); margin: 0 auto 20px; }
.divider.left { margin-left: 0; }

/* ---------- 3. 顶部导航 ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
  transition: box-shadow .3s ease;
}
.nav.scrolled { box-shadow: 0 4px 20px rgba(15, 60, 60, .08); }
.nav-inner {
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.logo { display: flex; align-items: center; gap: 11px; flex-shrink: 0; }
.logo-mark {
  width: 40px; height: 40px;
  border-radius: 11px;
  background: linear-gradient(135deg, var(--brand) 0%, #14b8a6 100%);
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 19px; font-weight: 700;
  box-shadow: 0 4px 12px rgba(15, 155, 142, .3);
}
.logo-text { line-height: 1.2; }
.logo-text b { font-size: 18px; display: block; letter-spacing: .5px; }
.logo-text span { font-size: 11px; color: var(--muted-2); letter-spacing: 1.6px; text-transform: uppercase; }

.nav-menu { display: flex; align-items: center; gap: 6px; }
.nav-menu a {
  position: relative;
  padding: 8px 14px;
  font-size: 15px;
  color: var(--ink-2);
  font-weight: 500;
  border-radius: 8px;
  transition: color .2s, background .2s;
}
.nav-menu a:hover { color: var(--brand); background: var(--brand-lighter); }
.nav-menu a.active { color: var(--brand); font-weight: 600; }
.nav-menu a.active::after {
  content: ""; position: absolute;
  left: 14px; right: 14px; bottom: 2px;
  height: 2.5px; border-radius: 2px; background: var(--brand);
}

.nav-actions { display: flex; align-items: center; gap: 12px; }
.nav-phone { font-size: 15px; font-weight: 700; color: var(--brand-dark); display: flex; align-items: center; gap: 6px; }
.nav-toggle {
  display: none;
  width: 42px; height: 42px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}
.nav-toggle span { display: block; width: 18px; height: 2px; background: var(--ink); border-radius: 2px; 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); }

/* ---------- 4. 首页 Hero ---------- */
.hero {
  position: relative;
  padding: 92px 0 0;
  background:
    radial-gradient(900px 460px at 88% 8%, rgba(20,184,166,.16), transparent 60%),
    radial-gradient(700px 400px at 6% 92%, rgba(47,125,209,.13), transparent 62%),
    var(--bg-soft);
  overflow: hidden;
}
.hero::after {
  content: "";
  position: absolute;
  right: -140px; top: -120px;
  width: 520px; height: 520px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(15,155,142,.13), transparent 68%);
}
.hero-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.08fr .92fr;
  gap: 56px;
  align-items: center;
  padding-bottom: 88px;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 16px 6px 8px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 13.5px; color: var(--ink-2);
  box-shadow: var(--shadow-sm);
  margin-bottom: 22px;
}
.hero-badge i {
  font-style: normal;
  background: var(--brand); color: #fff;
  padding: 2px 10px; border-radius: 999px;
  font-size: 12px; font-weight: 700;
}
.hero h1 { font-size: 46px; line-height: 1.28; letter-spacing: -1px; margin-bottom: 20px; }
.hero h1 em { font-style: normal; color: var(--brand); position: relative; }
.hero-desc { font-size: 17px; color: var(--muted); margin-bottom: 32px; max-width: 540px; }
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 34px; }
.hero-points { display: flex; gap: 28px; flex-wrap: wrap; }
.hero-points li { display: flex; align-items: center; gap: 8px; font-size: 15px; color: var(--ink-2); font-weight: 500; }
.hero-points .tick {
  width: 20px; height: 20px; border-radius: 50%;
  background: var(--brand-light); color: var(--brand);
  display: flex; align-items: center; justify-content: center;
  font-size: 12px; font-weight: 700; flex-shrink: 0;
}

/* Hero 右侧卡片 */
.hero-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 30px;
  box-shadow: var(--shadow-lg);
}
.hero-card h3 { font-size: 19px; margin-bottom: 4px; }
.hero-card .sub { font-size: 13.5px; color: var(--muted); margin-bottom: 22px; }
.field { margin-bottom: 15px; }
.field label { display: block; font-size: 13.5px; font-weight: 600; margin-bottom: 7px; color: var(--ink-2); }
.field input, .field select, .field textarea {
  width: 100%;
  height: 44px;
  padding: 0 14px;
  border: 1.5px solid var(--line);
  border-radius: 10px;
  font-size: 15px;
  font-family: inherit;
  color: var(--ink);
  background: #fff;
  transition: border-color .2s, box-shadow .2s;
}
.field textarea { height: auto; padding: 12px 14px; resize: vertical; min-height: 96px; }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--brand); box-shadow: 0 0 0 3px rgba(15,155,142,.12);
}
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.form-note { font-size: 12.5px; color: var(--muted-2); margin-top: 12px; text-align: center; }
.form-msg { margin-top: 14px; font-size: 14px; padding: 10px 14px; border-radius: 10px; display: none; }
.form-msg.ok { display: block; background: var(--brand-light); color: var(--brand-deep); }
.form-msg.err { display: block; background: #fdeceb; color: #b3352b; }

/* ---------- 5. 数据条 ---------- */
.stats { background: var(--brand-deep); color: #fff; padding: 40px 0; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; text-align: center; }
.stat-item .num { font-size: 38px; font-weight: 700; line-height: 1.2; letter-spacing: -1px; }
.stat-item .num small { font-size: 18px; font-weight: 600; margin-left: 2px; }
.stat-item .lbl { font-size: 14.5px; color: rgba(255,255,255,.72); margin-top: 4px; }

/* ---------- 6. 卡片网格 ---------- */
.grid { display: grid; gap: 24px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: all .3s ease;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: rgba(15,155,142,.28); }
.card .icon {
  width: 52px; height: 52px;
  border-radius: 14px;
  background: var(--brand-light);
  color: var(--brand);
  display: flex; align-items: center; justify-content: center;
  font-size: 24px; margin-bottom: 18px;
}
.card h3 { font-size: 19px; margin-bottom: 10px; }
.card p { color: var(--muted); font-size: 14.8px; }

/* ---------- 7. 服务流程 ---------- */
.steps { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0; position: relative; }
.step { text-align: center; padding: 0 14px; position: relative; }
.step::after {
  content: ""; position: absolute;
  top: 26px; left: 50%; width: 100%; height: 2px;
  background: repeating-linear-gradient(90deg, var(--brand) 0 7px, transparent 7px 14px);
  opacity: .35;
}
.step:last-child::after { display: none; }
.step .dot {
  position: relative; z-index: 2;
  width: 54px; height: 54px; margin: 0 auto 16px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid var(--brand);
  color: var(--brand);
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; font-weight: 700;
  box-shadow: 0 0 0 6px var(--brand-lighter);
}
.step h4 { font-size: 16.5px; margin-bottom: 6px; }
.step p { font-size: 13.8px; color: var(--muted); }

/* ---------- 8. 师资卡片 ---------- */
.teacher {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all .3s ease;
}
.teacher:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.teacher-top {
  height: 132px;
  background: linear-gradient(135deg, var(--brand-light), #d9eefc);
  display: flex; align-items: center; justify-content: center;
  position: relative;
}
.teacher-avatar {
  width: 76px; height: 76px; border-radius: 50%;
  background: #fff; border: 3px solid #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 26px; font-weight: 700; color: var(--brand-dark);
  box-shadow: var(--shadow-sm);
}
.teacher-body { padding: 22px 24px 26px; text-align: center; }
.teacher-body h4 { font-size: 18px; margin-bottom: 4px; }
.teacher-body .meta { font-size: 13.5px; color: var(--muted); margin-bottom: 14px; }
.teacher-tags { display: flex; gap: 6px; justify-content: center; flex-wrap: wrap; margin-bottom: 14px; }
.teacher-body .desc { font-size: 14px; color: var(--muted); text-align: left; }

/* ---------- 9. 城市卡 ---------- */
.city-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--line);
  transition: all .3s ease;
}
.city-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.city-visual {
  height: 148px;
  display: flex; align-items: center; justify-content: center;
  color: #fff; position: relative;
}
.city-visual.nj { background: linear-gradient(160deg, rgba(11,68,90,.5), rgba(15,155,142,.68)), url('../img/office-nanjing.jpg') center/cover no-repeat; }
.city-visual.sz { background: linear-gradient(160deg, rgba(19,120,100,.5), rgba(20,184,166,.68)), url('../img/office-suzhou.jpg') center/cover no-repeat; }
.city-visual.sh { background: linear-gradient(160deg, rgba(30,80,140,.5), rgba(47,125,209,.68)), url('../img/office-shanghai.jpg') center/cover no-repeat; }
.city-visual b { font-size: 30px; letter-spacing: 3px; text-shadow: 0 2px 10px rgba(0,0,0,.18); }
.city-visual .en { position: absolute; bottom: 12px; font-size: 12px; letter-spacing: 4px; opacity: .8; text-transform: uppercase; }
.city-body { padding: 24px 26px 28px; }
.city-body h3 { font-size: 20px; margin-bottom: 6px; }
.city-body .lead { font-size: 14px; color: var(--muted); margin-bottom: 16px; }
.city-districts { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 18px; }
.city-districts span {
  font-size: 12.5px; padding: 3px 10px;
  background: var(--bg-soft); border: 1px solid var(--line);
  border-radius: 6px; color: var(--ink-2);
}
.city-meta { display: flex; justify-content: space-between; align-items: center; border-top: 1px dashed var(--line); padding-top: 16px; }
.city-meta .c { font-size: 13.5px; color: var(--muted); }
.city-meta .c b { display: block; font-size: 20px; color: var(--brand-dark); }

/* ---------- 10. 家长评价 ---------- */
.quote-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
  display: flex; flex-direction: column;
  transition: all .3s ease;
}
.quote-card:hover { box-shadow: var(--shadow); transform: translateY(-4px); }
.quote-mark { font-size: 42px; color: var(--brand-light); line-height: 1; font-family: Georgia, serif; height: 26px; }
.quote-card p { color: var(--ink-2); font-size: 15px; margin-bottom: 20px; flex: 1; }
.quote-user { display: flex; align-items: center; gap: 12px; border-top: 1px solid var(--line); padding-top: 16px; }
.quote-user .av {
  width: 40px; height: 40px; border-radius: 50%;
  background: var(--brand-light); color: var(--brand-dark);
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 15px; flex-shrink: 0;
}
.quote-user b { display: block; font-size: 14.5px; }
.quote-user span { font-size: 13px; color: var(--muted); }

/* ---------- 11. CTA ---------- */
.cta-band {
  background: linear-gradient(120deg, var(--brand-deep), var(--brand) 55%, #14b8a6);
  color: #fff;
  padding: 66px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-band::before {
  content: ""; position: absolute;
  left: -60px; bottom: -140px; width: 360px; height: 360px;
  border-radius: 50%; background: rgba(255,255,255,.07);
}
.cta-band h2 { font-size: 32px; margin-bottom: 12px; position: relative; }
.cta-band p { color: rgba(255,255,255,.85); margin-bottom: 28px; position: relative; }
.cta-btns { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; position: relative; }
.btn-white { background: #fff; color: var(--brand-deep); font-weight: 700; }
.btn-white:hover { transform: translateY(-2px); box-shadow: 0 10px 26px rgba(0,0,0,.18); }

/* ---------- 12. 内页 Banner ---------- */
.page-banner {
  padding: 72px 0 64px;
  background:
    radial-gradient(700px 340px at 85% 10%, rgba(20,184,166,.16), transparent 62%),
    var(--brand-lighter);
  border-bottom: 1px solid var(--line);
  text-align: center;
}
.page-banner h1 { font-size: 36px; margin-bottom: 12px; letter-spacing: -.5px; }
.page-banner p { color: var(--muted); font-size: 16.5px; max-width: 620px; margin: 0 auto; }
.breadcrumb { font-size: 13.5px; color: var(--muted-2); margin-bottom: 14px; }
.breadcrumb a:hover { color: var(--brand); }

/* ---------- 13. 内容块 ---------- */
.content-block { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.content-block.reverse .cb-text { order: 2; }
.cb-text h2 { font-size: 30px; margin-bottom: 16px; line-height: 1.4; }
.cb-text p { color: var(--muted); margin-bottom: 16px; }
.cb-list { margin-top: 22px; }
.cb-list li { display: flex; gap: 12px; margin-bottom: 14px; font-size: 15.2px; color: var(--ink-2); }
.cb-list .n {
  width: 24px; height: 24px; border-radius: 50%;
  background: var(--brand); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 12.5px; font-weight: 700; flex-shrink: 0; margin-top: 3px;
}
.cb-visual {
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--brand-lighter), #e3f0fb);
  border: 1px solid var(--line);
  padding: 40px;
  min-height: 340px;
  display: flex; flex-direction: column; justify-content: center; gap: 16px;
}
.vstat {
  background: #fff; border-radius: 12px; padding: 18px 22px;
  box-shadow: var(--shadow-sm);
  display: flex; align-items: center; gap: 16px;
}
.vstat .big { font-size: 28px; font-weight: 700; color: var(--brand-dark); line-height: 1; }
.vstat .txt { font-size: 14px; color: var(--muted); }

/* 门面实景照片 */
.office-photo {
  margin: 0 0 6px; border-radius: 12px; overflow: hidden;
  box-shadow: var(--shadow-sm); position: relative; background: #fff;
}
.office-photo img { width: 100%; display: block; aspect-ratio: 16 / 9; object-fit: cover; }
.office-photo figcaption {
  position: absolute; left: 0; right: 0; bottom: 0;
  padding: 22px 14px 10px; font-size: 12.5px; color: #fff;
  background: linear-gradient(transparent, rgba(0,0,0,.6));
}
.office-strip { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.office-strip figure {
  margin: 0; border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow); position: relative; background: #fff;
}
.office-strip img { width: 100%; display: block; aspect-ratio: 4 / 3; object-fit: cover; transition: transform .4s ease; }
.office-strip figure:hover img { transform: scale(1.04); }
.office-strip figcaption {
  position: absolute; left: 0; right: 0; bottom: 0;
  padding: 34px 16px 14px; font-size: 13.5px; color: #fff;
  background: linear-gradient(transparent, rgba(0,0,0,.65));
}
.office-strip figcaption b { display: block; font-size: 15.5px; margin-bottom: 3px; }
@media (max-width: 900px) { .office-strip { grid-template-columns: 1fr; } }

/* 付费模式横幅 */
.pay-banner {
  background: linear-gradient(135deg, var(--brand-dark), var(--brand));
  border-radius: var(--radius-lg); padding: 46px; color: #fff; box-shadow: var(--shadow);
}
.pb-kicker { font-size: 12px; letter-spacing: 3px; text-transform: uppercase; color: rgba(255,255,255,.7); }
.pay-banner h2 { color: #fff; font-size: 28px; margin: 10px 0 8px; }
.pb-head > p { color: rgba(255,255,255,.85); max-width: 640px; }
.pb-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 30px; }
.pb-item {
  background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.2);
  border-radius: 14px; padding: 24px;
}
.pb-ic { font-size: 26px; display: block; margin-bottom: 12px; }
.pb-item b { font-size: 17px; display: block; margin-bottom: 6px; }
.pb-item p { font-size: 14px; color: rgba(255,255,255,.82); margin: 0; }
@media (max-width: 900px) {
  .pb-grid { grid-template-columns: 1fr; }
  .pay-banner { padding: 30px 24px; }
}

/* 课程 / 价格表 */
.course-table { border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: #fff; }
.ct-row { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: 16px; padding: 18px 26px; align-items: center; border-bottom: 1px solid var(--line); }
.ct-row:last-child { border-bottom: none; }
.ct-head { background: var(--brand-lighter); font-weight: 700; font-size: 14.5px; color: var(--brand-deep); }
.ct-row:not(.ct-head):hover { background: var(--bg-soft); }
.ct-row .name { font-weight: 600; font-size: 15.5px; }
.ct-row .name small { display: block; font-weight: 400; font-size: 13px; color: var(--muted); }
.ct-row .price { color: var(--brand-dark); font-weight: 700; font-size: 17px; }
.ct-row .price small { font-size: 12.5px; color: var(--muted); font-weight: 400; }

/* 联系信息 */
.info-card {
  background: #fff; border: 1px solid var(--line);
  border-radius: var(--radius); padding: 26px 24px;
  display: flex; gap: 16px; align-items: flex-start;
}
.info-card .ic {
  width: 44px; height: 44px; border-radius: 12px;
  background: var(--brand-light); color: var(--brand);
  display: flex; align-items: center; justify-content: center;
  font-size: 19px; flex-shrink: 0;
}
.info-card b { display: block; font-size: 15.5px; margin-bottom: 3px; }
.info-card p { font-size: 14.5px; color: var(--muted); }
.info-card a { color: var(--brand-dark); font-weight: 600; }

/* FAQ */
.faq-item { border: 1px solid var(--line); border-radius: var(--radius); margin-bottom: 14px; background: #fff; overflow: hidden; }
.faq-q {
  padding: 18px 24px; font-weight: 600; font-size: 16px;
  cursor: pointer; display: flex; justify-content: space-between; align-items: center; gap: 16px;
  transition: background .2s;
}
.faq-q:hover { background: var(--brand-lighter); }
.faq-q .arw { color: var(--brand); transition: transform .3s; font-size: 18px; }
.faq-item.open .faq-q .arw { transform: rotate(45deg); }
.faq-a { padding: 0 24px; max-height: 0; overflow: hidden; transition: max-height .35s ease, padding .3s ease; color: var(--muted); font-size: 15px; }
.faq-item.open .faq-a { padding: 0 24px 20px; max-height: 400px; }

/* ---------- 14. 页脚 ---------- */
.footer { background: #0d2429; color: rgba(255,255,255,.7); padding: 68px 0 0; }
.footer-top { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.3fr; gap: 40px; padding-bottom: 48px; }
.footer .logo-text b { color: #fff; }
.footer .logo-text span { color: rgba(255,255,255,.45); }
.footer-about { font-size: 14.5px; margin: 18px 0 20px; max-width: 320px; }
.footer h4 { color: #fff; font-size: 16px; margin-bottom: 18px; }
.footer ul li { margin-bottom: 11px; font-size: 14.5px; }
.footer ul li a:hover { color: #14b8a6; }
.footer-contact li { display: flex; gap: 10px; }
.footer-contact .k { color: rgba(255,255,255,.4); flex-shrink: 0; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  padding: 22px 0;
  display: flex; justify-content: space-between; align-items: center;
  font-size: 13.5px; color: rgba(255,255,255,.45);
  flex-wrap: wrap; gap: 10px;
}
.footer-bottom a:hover { color: #14b8a6; }
.beian-no { flex-basis: 100%; margin-top: 6px; text-align: center; letter-spacing: .3px; color: rgba(255,255,255,.55); }
.beian-no a { color: rgba(255,255,255,.7); font-weight: 500; }
.beian-no a:hover { color: #14b8a6; }
.beian-sep { margin: 0 10px; color: rgba(255,255,255,.35); }

/* ---------- 15. 回到顶部 ---------- */
.to-top {
  position: fixed; right: 26px; bottom: 30px;
  width: 46px; height: 46px; border-radius: 50%;
  background: var(--brand); color: #fff;
  border: none; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px;
  box-shadow: var(--shadow);
  opacity: 0; visibility: hidden;
  transition: all .3s ease;
  z-index: 90;
}
.to-top.show { opacity: 1; visibility: visible; }
.to-top:hover { background: var(--brand-dark); transform: translateY(-3px); }

/* 浮动咨询条（移动端） */
.mobile-bar {
  display: none;
  position: fixed; left: 0; right: 0; bottom: 0;
  background: #fff; border-top: 1px solid var(--line);
  padding: 10px 16px; gap: 10px;
  box-shadow: 0 -4px 18px rgba(15,60,60,.08);
  z-index: 95;
}
.mobile-bar .btn { flex: 1; height: 44px; }

/* ---------- 16. 滚动动画 ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---------- 16.5 政策/条款正文 ---------- */
.policy { max-width: 860px; margin: 0 auto; }
.policy .updated {
  font-size: 13.5px; color: var(--muted-2);
  background: var(--bg-soft); border: 1px solid var(--line);
  border-radius: 10px; padding: 10px 16px; margin-bottom: 28px;
}
.policy h3 {
  font-size: 19px; margin: 36px 0 14px;
  padding-left: 14px; border-left: 4px solid var(--brand);
  line-height: 1.4;
}
.policy p { color: var(--muted); margin-bottom: 13px; font-size: 15.3px; }
.policy ul { margin: 0 0 16px 24px; }
.policy li { color: var(--muted); font-size: 15.3px; margin-bottom: 9px; list-style: disc; }
.policy li b { color: var(--ink-2); }
.policy a { color: var(--brand-dark); font-weight: 600; }
.policy a:hover { text-decoration: underline; }
.policy .disclaimer {
  margin-top: 40px; padding-top: 18px;
  border-top: 1px dashed var(--line);
  font-size: 12.5px; color: var(--muted-2);
}

/* ---------- 17. 响应式 ---------- */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero h1 { font-size: 38px; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(3, 1fr); gap: 26px 0; }
  .step:nth-child(3)::after { display: none; }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .content-block { gap: 36px; }
}

@media (max-width: 860px) {
  .nav-menu {
    position: absolute; top: var(--nav-h); left: 0; right: 0;
    background: #fff; border-bottom: 1px solid var(--line);
    flex-direction: column; align-items: stretch;
    padding: 10px 16px 18px;
    box-shadow: var(--shadow);
    display: none;
  }
  .nav-menu.open { display: flex; }
  .nav-menu a { padding: 12px 10px; font-size: 16px; }
  .nav-menu a.active::after { display: none; }
  .nav-phone { display: none; }
  .nav-toggle { display: flex; }
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 30px 16px; }
  .content-block { grid-template-columns: 1fr; }
  .content-block.reverse .cb-text { order: 0; }
  .sec { padding: 64px 0; }
  .sec-head h2 { font-size: 27px; }
  .hero { padding-top: 56px; }
  .hero h1 { font-size: 31px; }
  .hero-grid { padding-bottom: 60px; }
  .ct-row { grid-template-columns: 1fr 1fr; gap: 8px 12px; padding: 16px 18px; }
  .ct-head { display: none; }
  .footer-top { grid-template-columns: 1fr; gap: 30px; }
  .mobile-bar { display: flex; }
  body { padding-bottom: 66px; }
  .to-top { bottom: 78px; }
  .page-banner h1 { font-size: 28px; }
  .cb-text h2 { font-size: 25px; }
  .cta-band h2 { font-size: 25px; }
}

@media (max-width: 520px) {
  .container { padding: 0 18px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-item .num { font-size: 30px; }
  .hero-cta .btn { width: 100%; }
  .field-row { grid-template-columns: 1fr; }
  .city-meta { flex-direction: column; gap: 10px; align-items: flex-start; }
}