/* ============================================================
   蓝翼航空模拟 BlueWing Aviation Simulation — 全站样式
   static/css/style.css
   ============================================================ */

/* ---------- CSS 变量 ---------- */
:root {
  --c-navy-900: #081a33;
  --c-navy-800: #0c2347;
  --c-navy-700: #123059;
  --c-navy-600: #1a4073;
  --c-blue-500: #2e8bff;
  --c-blue-400: #55a3ff;
  --c-sky-300: #8ec5ff;
  --c-gold-500: #f0a93a;
  --c-gold-400: #f7c257;
  --c-white: #ffffff;
  --c-bg: #f4f7fc;
  --c-bg-soft: #eaf1fb;
  --c-text: #1c2430;
  --c-text-soft: #5a6575;
  --c-text-muted: #8a94a6;
  --c-line: #e3e9f2;
  --radius: 14px;
  --radius-lg: 20px;
  --shadow-sm: 0 2px 10px rgba(12, 35, 71, .08);
  --shadow-md: 0 10px 30px rgba(12, 35, 71, .12);
  --shadow-lg: 0 24px 60px rgba(12, 35, 71, .22);
  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "微软雅黑", "Helvetica Neue", Arial, sans-serif;
}

/* ---------- Reset / Base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font);
  color: var(--c-text);
  background: var(--c-white);
  line-height: 1.7;
  font-size: 16px;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; border: 0; }
a { color: inherit; text-decoration: none; transition: color .25s ease; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: 0; background: none; }
input, select, textarea { font-family: inherit; font-size: 1rem; }
h1, h2, h3, h4, h5 { line-height: 1.3; font-weight: 700; color: var(--c-navy-900); }
.container { width: min(1200px, 92%); margin-inline: auto; }
.section { padding: 84px 0; }
.section-alt { background: var(--c-bg); }

/* ---------- 通用标题块 ---------- */
.sec-head { max-width: 720px; margin: 0 auto 46px; text-align: center; }
.sec-tag {
  display: inline-block; font-size: .8rem; letter-spacing: .22em;
  color: var(--c-blue-500); background: rgba(46,139,255,.1);
  padding: 6px 16px; border-radius: 999px; margin-bottom: 14px;
  font-weight: 600; text-transform: uppercase;
}
.sec-title { font-size: clamp(1.7rem, 3.2vw, 2.4rem); margin-bottom: 14px; }
.sec-desc { color: var(--c-text-soft); font-size: 1.05rem; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 30px; border-radius: 999px; font-size: .98rem; font-weight: 600;
  transition: all .28s ease; white-space: nowrap;
}
.btn-primary { background: var(--c-blue-500); color: #fff; box-shadow: 0 8px 22px rgba(46,139,255,.35); }
.btn-primary:hover { background: var(--c-navy-600); transform: translateY(-2px); }
.btn-outline { border: 2px solid rgba(255,255,255,.85); color: #fff; }
.btn-outline:hover { background: rgba(255,255,255,.14); transform: translateY(-2px); }
.btn-outline-dark { border: 2px solid var(--c-navy-700); color: var(--c-navy-700); }
.btn-outline-dark:hover { background: var(--c-navy-700); color: #fff; }
.btn-gold { background: var(--c-gold-500); color: var(--c-navy-900); }
.btn-gold:hover { background: var(--c-gold-400); transform: translateY(-2px); }

/* ============================================================
   顶部导航
   ============================================================ */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  background: rgba(8,26,51,.92); backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255,255,255,.08);
  transition: background .3s ease, box-shadow .3s ease;
}
.site-header.scrolled { background: rgba(8,26,51,.98); box-shadow: 0 6px 24px rgba(0,0,0,.25); }
.nav-wrap { display: flex; align-items: center; justify-content: space-between; height: 74px; }
.brand { display: flex; align-items: center; gap: 11px; color: #fff; }
.brand-logo {
  width: 42px; height: 42px; border-radius: 11px; flex: none;
  background: linear-gradient(135deg, var(--c-blue-500), var(--c-navy-600));
  display: grid; place-items: center; box-shadow: 0 6px 16px rgba(46,139,255,.45);
}
.brand-name { font-size: 1.16rem; font-weight: 800; letter-spacing: .04em; line-height: 1.2; }
.brand-sub { font-size: .62rem; letter-spacing: .3em; color: var(--c-sky-300); text-transform: uppercase; }
.nav-list { display: flex; align-items: center; gap: 6px; }
.nav-list a {
  color: rgba(255,255,255,.82); font-size: .98rem; font-weight: 500;
  padding: 9px 16px; border-radius: 8px; position: relative;
}
.nav-list a:hover { color: #fff; background: rgba(255,255,255,.08); }
.nav-list a.active { color: #fff; font-weight: 600; }
.nav-list a.active::after {
  content: ""; position: absolute; left: 16px; right: 16px; bottom: 4px;
  height: 2px; border-radius: 2px; background: var(--c-blue-400);
}
.nav-cta { margin-left: 10px; }
.nav-cta .btn { padding: 9px 20px; font-size: .9rem; }
.nav-toggle { display: none; flex-direction: column; gap: 5px; padding: 10px; }
.nav-toggle span { width: 24px; height: 2px; background: #fff; border-radius: 2px; transition: all .3s ease; }

@media (max-width: 900px) {
  .nav-toggle { display: flex; }
  .nav-cta { display: none; }
  .nav-list {
    position: fixed; top: 74px; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 2px;
    background: var(--c-navy-900); padding: 12px 6% 20px;
    border-bottom: 1px solid rgba(255,255,255,.1);
    transform: translateY(-16px); opacity: 0; pointer-events: none;
    transition: all .3s ease;
  }
  .nav-list.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav-list a { padding: 14px 16px; font-size: 1.05rem; }
  .nav-list a.active::after { display: none; }
  .nav-list a.active { background: rgba(46,139,255,.18); }
}

/* ============================================================
   Hero（首页大屏）
   ============================================================ */
.hero {
  position: relative; min-height: 92vh; display: flex; align-items: center;
  color: #fff; padding: 130px 0 90px; overflow: hidden;
  background: linear-gradient(180deg, rgba(8,26,51,.55), rgba(8,26,51,.78)), url("../pic/hero-main.jpg") center/cover no-repeat;
}
.hero::after {
  content: ""; position: absolute; inset: auto 0 0 0; height: 160px;
  background: linear-gradient(180deg, transparent, rgba(8,26,51,.85));
}
.hero-content { position: relative; z-index: 2; max-width: 720px; }
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: .84rem; letter-spacing: .16em; color: var(--c-sky-300);
  background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.22);
  padding: 7px 16px; border-radius: 999px; margin-bottom: 22px;
}
.hero h1 { color: #fff; font-size: clamp(2.2rem, 5vw, 3.6rem); font-weight: 800; letter-spacing: .01em; margin-bottom: 20px; }
.hero h1 .accent { color: var(--c-gold-400); }
.hero p.lead { font-size: clamp(1.02rem, 1.6vw, 1.22rem); color: rgba(255,255,255,.9); max-width: 620px; margin-bottom: 34px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 16px; margin-bottom: 42px; }
.hero-stats { display: flex; flex-wrap: wrap; gap: 34px; }
.hero-stat .num { font-size: 1.9rem; font-weight: 800; color: var(--c-gold-400); }
.hero-stat .lbl { font-size: .86rem; color: rgba(255,255,255,.78); }

/* ---------- 页面内页头（news/about/contact） ---------- */
.page-hero {
  position: relative; color: #fff; padding: 168px 0 78px; overflow: hidden;
  background: linear-gradient(180deg, rgba(8,26,51,.62), rgba(8,26,51,.84)), var(--page-hero-bg, url("../pic/center.jpg")) center/cover no-repeat;
}
.page-hero h1 { color: #fff; font-size: clamp(2rem, 4vw, 2.9rem); margin-bottom: 12px; }
.page-hero p { color: rgba(255,255,255,.88); font-size: 1.08rem; max-width: 640px; }

/* 面包屑 */
.breadcrumb { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; font-size: .9rem; color: rgba(255,255,255,.72); }
.breadcrumb a { color: var(--c-sky-300); }
.breadcrumb a:hover { color: #fff; }
.breadcrumb .sep { color: rgba(255,255,255,.4); }

/* ============================================================
   首页特色卡片 / 通用卡片
   ============================================================ */
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.feature-card {
  background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius-lg);
  padding: 34px 28px; transition: transform .3s ease, box-shadow .3s ease;
}
.feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.feature-icon {
  width: 58px; height: 58px; border-radius: 16px; display: grid; place-items: center;
  background: linear-gradient(135deg, rgba(46,139,255,.16), rgba(46,139,255,.05));
  color: var(--c-blue-500); margin-bottom: 20px;
}
.feature-card h3 { font-size: 1.22rem; margin-bottom: 10px; }
.feature-card p { color: var(--c-text-soft); font-size: .96rem; }

/* ---------- 机型展示 ---------- */
.fleet-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.fleet-card {
  border-radius: var(--radius-lg); overflow: hidden; background: #fff;
  border: 1px solid var(--c-line); transition: transform .3s ease, box-shadow .3s ease;
}
.fleet-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.fleet-card .thumb { position: relative; aspect-ratio: 4 / 3; overflow: hidden; }
.fleet-card .thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s ease; }
.fleet-card:hover .thumb img { transform: scale(1.06); }
.fleet-badge {
  position: absolute; top: 14px; left: 14px; background: rgba(8,26,51,.82);
  color: var(--c-gold-400); font-size: .78rem; padding: 5px 12px; border-radius: 999px;
  letter-spacing: .08em;
}
.fleet-body { padding: 22px 24px 26px; }
.fleet-body h3 { font-size: 1.2rem; margin-bottom: 8px; }
.fleet-body p { color: var(--c-text-soft); font-size: .93rem; margin-bottom: 14px; }
.fleet-body ul { display: grid; gap: 6px; font-size: .9rem; color: var(--c-text-soft); }
.fleet-body ul li { display: flex; gap: 8px; align-items: flex-start; }
.fleet-body ul li::before { content: "✓"; color: var(--c-blue-500); font-weight: 700; }

/* ---------- 数据统计带 ---------- */
.stats-band {
  background: linear-gradient(120deg, var(--c-navy-800), var(--c-navy-600));
  color: #fff; padding: 64px 0;
}
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; text-align: center; }
.stat-item .num { font-size: clamp(2rem, 4vw, 2.9rem); font-weight: 800; color: var(--c-gold-400); }
.stat-item .num sup { font-size: 1.2rem; }
.stat-item .lbl { color: rgba(255,255,255,.82); margin-top: 6px; font-size: .96rem; }

/* ---------- 双栏图文（intro / about） ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 54px; align-items: center; }
.split-media { position: relative; }
.split-media .main-img { border-radius: var(--radius-lg); box-shadow: var(--shadow-md); width: 100%; object-fit: cover; aspect-ratio: 4/3; }
.split-media .float-card {
  position: absolute; right: -18px; bottom: -22px; background: #fff;
  border-radius: 16px; box-shadow: var(--shadow-lg); padding: 16px 22px;
  display: flex; align-items: center; gap: 12px; border: 1px solid var(--c-line);
}
.split-media .float-card .ic { color: var(--c-gold-500); }
.split-media .float-card .n { font-size: 1.5rem; font-weight: 800; color: var(--c-navy-900); line-height: 1.1; }
.split-media .float-card .t { font-size: .82rem; color: var(--c-text-soft); }
.split-body h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); margin-bottom: 16px; }
.split-body .sec-tag { margin-left: 0; }
.split-body p { color: var(--c-text-soft); margin-bottom: 14px; }
.check-list { display: grid; gap: 10px; margin: 18px 0 26px; }
.check-list li { display: flex; gap: 10px; align-items: flex-start; color: var(--c-text); font-weight: 500; }
.check-list li::before {
  content: ""; width: 22px; height: 22px; flex: none; margin-top: 2px;
  background: var(--c-blue-500) center/12px no-repeat; border-radius: 50%;
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath fill='%23fff' d='M9 16.2 4.8 12l-1.4 1.4L9 19 21 7l-1.4-1.4z'/%3E%3C/svg%3E") center/12px no-repeat;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath fill='%23fff' d='M9 16.2 4.8 12l-1.4 1.4L9 19 21 7l-1.4-1.4z'/%3E%3C/svg%3E") center/12px no-repeat;
}

/* ---------- 新闻卡片 ---------- */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.news-card {
  display: flex; flex-direction: column; background: #fff;
  border: 1px solid var(--c-line); border-radius: var(--radius-lg); overflow: hidden;
  transition: transform .3s ease, box-shadow .3s ease;
}
.news-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.news-card .thumb { aspect-ratio: 16 / 9; overflow: hidden; }
.news-card .thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s ease; }
.news-card:hover .thumb img { transform: scale(1.06); }
.news-card .body { padding: 22px 24px 24px; display: flex; flex-direction: column; flex: 1; }
.news-meta { display: flex; align-items: center; gap: 10px; font-size: .82rem; color: var(--c-text-muted); margin-bottom: 10px; }
.news-meta .tag { color: var(--c-blue-500); font-weight: 600; }
.news-card h3 { font-size: 1.12rem; margin-bottom: 8px; line-height: 1.45; }
.news-card h3 a:hover { color: var(--c-blue-500); }
.news-card .body p { color: var(--c-text-soft); font-size: .92rem; flex: 1; }
.news-card .more { margin-top: 16px; font-size: .9rem; color: var(--c-blue-500); font-weight: 600; }

/* ---------- CTA ---------- */
.cta-band {
  background: linear-gradient(120deg, var(--c-navy-700), var(--c-blue-500));
  color: #fff; padding: 66px 0; text-align: center;
}
.cta-band h2 { color: #fff; font-size: clamp(1.7rem, 3.4vw, 2.4rem); margin-bottom: 14px; }
.cta-band p { color: rgba(255,255,255,.86); max-width: 620px; margin: 0 auto 30px; }
.cta-band .btn { margin: 0 8px 8px; }

/* ---------- 伙伴 ---------- */
.partner-strip { display: flex; flex-wrap: wrap; justify-content: center; gap: 18px 34px; align-items: center; }
.partner-item { color: var(--c-text-muted); font-weight: 700; font-size: 1.05rem; letter-spacing: .04em; opacity: .8; transition: opacity .3s; }
.partner-item:hover { opacity: 1; }

/* ============================================================
   新闻中心页
   ============================================================ */
.news-layout { display: grid; grid-template-columns: 1fr 320px; gap: 40px; align-items: start; }
.filter-bar { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 30px; }
.filter-btn {
  padding: 9px 20px; border-radius: 999px; font-size: .92rem; font-weight: 500;
  border: 1px solid var(--c-line); color: var(--c-text-soft); background: #fff;
  transition: all .25s ease;
}
.filter-btn:hover { border-color: var(--c-blue-500); color: var(--c-blue-500); }
.filter-btn.active { background: var(--c-blue-500); border-color: var(--c-blue-500); color: #fff; }
.news-list { display: grid; gap: 26px; }
.news-row {
  display: grid; grid-template-columns: 300px 1fr; gap: 24px; background: #fff;
  border: 1px solid var(--c-line); border-radius: var(--radius-lg); overflow: hidden;
  transition: transform .3s ease, box-shadow .3s ease;
}
.news-row:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.news-row .thumb { position: relative; min-height: 200px; }
.news-row .thumb img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.news-row .row-body { padding: 26px 26px 22px; }
.news-row h3 { font-size: 1.25rem; margin-bottom: 8px; }
.news-row h3 a:hover { color: var(--c-blue-500); }
.news-row .row-body p { color: var(--c-text-soft); font-size: .95rem; margin-bottom: 12px; }
.pagination { display: flex; gap: 8px; justify-content: center; margin-top: 44px; }
.pagination a {
  min-width: 42px; height: 42px; display: grid; place-items: center;
  border: 1px solid var(--c-line); border-radius: 10px; color: var(--c-text-soft); font-weight: 600;
}
.pagination a:hover { border-color: var(--c-blue-500); color: var(--c-blue-500); }
.pagination a.cur { background: var(--c-blue-500); border-color: var(--c-blue-500); color: #fff; }

/* 侧栏 */
.sidebar { display: grid; gap: 26px; position: sticky; top: 96px; }
.widget { background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius-lg); padding: 24px; }
.widget h3 { font-size: 1.08rem; margin-bottom: 16px; padding-bottom: 12px; border-bottom: 2px solid var(--c-bg-soft); position: relative; }
.widget h3::after { content: ""; position: absolute; left: 0; bottom: -2px; width: 46px; height: 2px; background: var(--c-blue-500); }
.widget ul { display: grid; gap: 12px; }
.widget ul li a { color: var(--c-text-soft); font-size: .94rem; display: block; }
.widget ul li a:hover { color: var(--c-blue-500); }
.hot-list li { display: flex; gap: 12px; align-items: flex-start; }
.hot-list .no { color: var(--c-blue-500); font-weight: 800; font-size: 1.2rem; line-height: 1.3; }
.hot-list li a { font-weight: 500; line-height: 1.5; }
.cat-list li { display: flex; justify-content: space-between; }
.cat-list .cnt { color: var(--c-text-muted); font-size: .84rem; }
.search-widget form { display: flex; gap: 8px; }
.search-widget input {
  flex: 1; border: 1px solid var(--c-line); border-radius: 10px; padding: 10px 14px; outline: none;
}
.search-widget input:focus { border-color: var(--c-blue-500); }
.search-widget button { background: var(--c-blue-500); color: #fff; border-radius: 10px; padding: 0 16px; }

/* ============================================================
   关于我们页
   ============================================================ */
.timeline { position: relative; max-width: 860px; margin: 0 auto; padding-left: 30px; }
.timeline::before { content: ""; position: absolute; left: 8px; top: 6px; bottom: 6px; width: 2px; background: linear-gradient(180deg, var(--c-blue-500), var(--c-navy-700)); }
.tl-item { position: relative; padding: 0 0 38px 24px; }
.tl-item::before {
  content: ""; position: absolute; left: -30px; top: 6px; width: 18px; height: 18px;
  border-radius: 50%; background: #fff; border: 4px solid var(--c-blue-500);
}
.tl-year { display: inline-block; color: var(--c-blue-500); font-weight: 800; font-size: 1.08rem; margin-bottom: 6px; letter-spacing: .05em; }
.tl-item h3 { font-size: 1.18rem; margin-bottom: 6px; }
.tl-item p { color: var(--c-text-soft); font-size: .95rem; }

.values-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.value-card { text-align: center; padding: 34px 26px; background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius-lg); }
.value-card .feature-icon { margin: 0 auto 18px; }

.qualify-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.qualify-item { display: flex; gap: 16px; align-items: flex-start; background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius); padding: 22px 24px; }
.qualify-item .ic { color: var(--c-gold-500); flex: none; margin-top: 2px; }
.qualify-item h4 { font-size: 1.05rem; margin-bottom: 4px; }
.qualify-item p { color: var(--c-text-soft); font-size: .9rem; }

.team-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.team-card { text-align: center; background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius-lg); padding: 30px 22px; }
.team-avatar { width: 96px; height: 96px; border-radius: 50%; margin: 0 auto 16px; overflow: hidden; border: 3px solid var(--c-bg-soft); }
.team-avatar img { width: 100%; height: 100%; object-fit: cover; }
.team-card h3 { font-size: 1.12rem; }
.team-card .role { color: var(--c-blue-500); font-size: .88rem; margin-bottom: 10px; font-weight: 600; }
.team-card p { color: var(--c-text-soft); font-size: .9rem; }

/* ============================================================
   联系我们页
   ============================================================ */
.contact-layout { display: grid; grid-template-columns: 1fr 1.2fr; gap: 40px; align-items: start; }
.info-card { display: flex; gap: 16px; align-items: flex-start; background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius); padding: 20px 22px; margin-bottom: 16px; }
.info-card .ic { color: var(--c-blue-500); flex: none; margin-top: 2px; }
.info-card h3 { font-size: 1.02rem; margin-bottom: 4px; }
.info-card p, .info-card a { color: var(--c-text-soft); font-size: .94rem; display: block; }
.info-card a:hover { color: var(--c-blue-500); }
.map-wrap { border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--c-line); box-shadow: var(--shadow-sm); }
.map-wrap iframe { display: block; width: 100%; height: 100%; min-height: 380px; border: 0; }

.contact-form { background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius-lg); padding: 34px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-group { display: flex; flex-direction: column; gap: 7px; }
.form-group.full { grid-column: 1 / -1; }
.form-group label { font-size: .9rem; font-weight: 600; color: var(--c-navy-800); }
.form-group label .req { color: #e5484d; }
.form-group input, .form-group select, .form-group textarea {
  border: 1px solid var(--c-line); border-radius: 10px; padding: 12px 14px; outline: none;
  background: var(--c-bg); transition: border-color .25s ease, box-shadow .25s ease;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  border-color: var(--c-blue-500); box-shadow: 0 0 0 3px rgba(46,139,255,.14); background: #fff;
}
.form-group textarea { resize: vertical; min-height: 130px; }
.form-tip { font-size: .82rem; color: var(--c-text-muted); margin-top: 4px; }
.form-submit { margin-top: 22px; display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.form-msg { font-size: .92rem; font-weight: 600; }
.form-msg.ok { color: #1a9c5e; }
.form-msg.err { color: #e5484d; }

.faq-list { max-width: 860px; margin: 0 auto; display: grid; gap: 14px; }
.faq-item { background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius); overflow: hidden; }
.faq-q {
  width: 100%; display: flex; justify-content: space-between; align-items: center; gap: 14px;
  padding: 18px 22px; font-size: 1.02rem; font-weight: 600; color: var(--c-navy-900); text-align: left;
}
.faq-q .arrow { color: var(--c-blue-500); transition: transform .3s ease; flex: none; }
.faq-item.open .faq-q .arrow { transform: rotate(180deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .35s ease; }
.faq-a p { padding: 0 22px 18px; color: var(--c-text-soft); font-size: .95rem; }

/* ============================================================
   页脚
   ============================================================ */
.site-footer { background: var(--c-navy-900); color: rgba(255,255,255,.74); padding: 64px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 44px; }
.footer-brand p { margin-top: 16px; font-size: .92rem; line-height: 1.8; }
.footer-col h4 { color: #fff; font-size: 1.04rem; margin-bottom: 18px; }
.footer-col ul { display: grid; gap: 11px; }
.footer-col a { color: rgba(255,255,255,.74); font-size: .93rem; }
.footer-col a:hover { color: var(--c-sky-300); }
.footer-contact li { display: flex; gap: 10px; font-size: .92rem; margin-bottom: 12px; }
.footer-contact .ic { color: var(--c-blue-400); flex: none; margin-top: 3px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.1); padding: 20px 0; font-size: .84rem; display: flex; justify-content: space-between; gap: 10px; flex-wrap: wrap; color: rgba(255,255,255,.5); }

/* ---------- 返回顶部 ---------- */
.to-top {
  position: fixed; right: 24px; bottom: 28px; z-index: 90;
  width: 46px; height: 46px; border-radius: 50%;
  background: var(--c-blue-500); color: #fff; display: grid; place-items: center;
  box-shadow: 0 8px 22px rgba(46,139,255,.4); opacity: 0; pointer-events: none; transform: translateY(12px);
  transition: all .3s ease;
}
.to-top.show { opacity: 1; pointer-events: auto; transform: translateY(0); }
.to-top:hover { background: var(--c-navy-600); }

/* ---------- 动画 ---------- */
@keyframes fadeUp { from { opacity: 0; transform: translateY(26px); } to { opacity: 1; transform: translateY(0); } }
.reveal { opacity: 0; }
.reveal.in { animation: fadeUp .7s ease forwards; }
.reveal.d1 { animation-delay: .08s; }
.reveal.d2 { animation-delay: .16s; }
.reveal.d3 { animation-delay: .24s; }

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1024px) {
  .feature-grid, .fleet-grid, .news-grid, .values-grid, .team-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .news-layout { grid-template-columns: 1fr; }
  .sidebar { position: static; grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .section { padding: 60px 0; }
  .hero { min-height: 86vh; padding: 110px 0 70px; }
  .hero-stats { gap: 22px; }
  .split, .contact-layout { grid-template-columns: 1fr; gap: 34px; }
  .split-media .float-card { right: 8px; bottom: -18px; }
  .feature-grid, .fleet-grid, .news-grid, .values-grid, .team-grid, .stats-grid { grid-template-columns: 1fr; }
  .stats-grid { gap: 22px; }
  .news-row { grid-template-columns: 1fr; }
  .news-row .thumb { min-height: 200px; }
  .form-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 30px; }
  .sidebar { grid-template-columns: 1fr; }
  .qualify-grid { grid-template-columns: 1fr; }
}