/* 快帆 · 归巢 · 候鸟迁徙 —— 暖杏白底 + 松针绿 + 夕阳琥珀(亮色调) */
:root {
  --bg: #FBF7EC;
  --card: #FFFFFF;
  --brand: #0E7A5A;
  --brand-deep: #0A5B42;
  --brand-darker: #084A36;
  --mint: #2F9E77;
  --mint-soft: #E4F1EA;
  --amber: #E89A3C;
  --amber-soft: #FBEED8;
  --line: #EAE3D2;
  --ink: #173B33;
  --ink-soft: #55706A;
  --foot: #0C2B22;
  --foot-ink: #B8CCC3;
  --radius: 14px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", -apple-system, sans-serif;
  background: var(--bg); color: var(--ink); line-height: 1.7; font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--brand-deep); text-decoration: none; }
a:hover { color: var(--amber); }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

/* ---------- 顶部细条 ---------- */
.topstrip {
  background: var(--brand-darker); color: #EAF5EF; font-size: 13px; text-align: center;
  padding: 7px 16px; letter-spacing: .5px;
}
.topstrip b { color: #FFD9A0; }

/* ---------- 导航(暖白实底通栏) ---------- */
.site-nav {
  background: rgba(251, 247, 236, .97); border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 50; backdrop-filter: blur(6px);
}
.site-nav::after {
  content: ""; display: block; height: 2px;
  background: linear-gradient(90deg, var(--brand) 0%, var(--mint) 55%, var(--amber) 100%);
}
.nav-inner { display: flex; align-items: center; gap: 24px; height: 66px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 21px; color: var(--brand-darker); }
.brand img { border-radius: 9px; }
.brand small { display: block; font-size: 11px; font-weight: 400; color: var(--ink-soft); line-height: 1.1; }
#nav { margin-left: auto; }
.nav-links { display: flex; gap: 4px; }
.nav-links a {
  color: var(--ink); font-size: 15px; padding: 8px 13px; border-radius: 999px;
  transition: .18s;
}
.nav-links a:hover { color: var(--brand-deep); background: var(--mint-soft); }
.nav-links a.active { color: #fff; background: var(--brand); }
.nav-cta {
  background: var(--brand); color: #fff; font-weight: 600; padding: 9px 20px;
  border-radius: 999px; font-size: 15px; transition: .18s; white-space: nowrap;
}
.nav-cta:hover { background: var(--brand-deep); color: #fff; }
#menuBtn { display: none; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-block; padding: 12px 26px; border-radius: 999px; font-size: 16px;
  font-weight: 600; transition: .18s; border: none; cursor: pointer;
}
.btn-primary { background: var(--brand); color: #fff; box-shadow: 0 6px 18px rgba(14, 122, 90, .22); }
.btn-primary:hover { background: var(--brand-deep); color: #fff; }
.btn-ghost { background: transparent; color: var(--brand-deep); border: 1.5px solid var(--brand); }
.btn-ghost:hover { background: var(--mint-soft); }
.btn-lg { padding: 15px 34px; font-size: 17px; }

/* ---------- 满幅居中 hero ---------- */
.hero {
  position: relative; text-align: center; padding: 66px 24px 60px;
  background: linear-gradient(180deg, #FDFAF1 0%, var(--bg) 60%);
  overflow: hidden;
}
.hero::before {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 140px;
  background: linear-gradient(180deg, rgba(232, 154, 60, .10) 0%, rgba(232, 154, 60, 0) 70%);
  pointer-events: none;
}
.hero-copy { position: relative; max-width: 760px; margin: 0 auto; }
.hero .flock { width: min(620px, 90%); margin: 0 auto 6px; }
.hero .kicker {
  display: inline-block; background: var(--mint-soft); color: var(--brand-deep);
  font-size: 13px; font-weight: 600; padding: 5px 16px; border-radius: 999px; margin-bottom: 16px;
}
.hero h1 { font-size: clamp(32px, 5vw, 50px); line-height: 1.18; color: var(--brand-darker); font-weight: 800; }
.hero h1 em { font-style: normal; color: var(--brand); }
.hero .lead { font-size: 18px; color: var(--ink-soft); max-width: 620px; margin: 18px auto 26px; }
.hero-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.hero-tags { display: flex; gap: 9px; justify-content: center; flex-wrap: wrap; margin-top: 26px; }
.hero-tags span {
  background: #fff; border: 1px solid var(--line); color: var(--ink-soft);
  font-size: 13px; padding: 5px 13px; border-radius: 999px;
}
.hero .nest { width: 84px; margin: 26px auto 0; opacity: .9; }

/* ---------- 分节 ---------- */
.section { padding: 60px 0; }
.section.tint { background: #F5F0E2; }
.section-head { text-align: center; max-width: 680px; margin: 0 auto 38px; }
.section-head h2 { font-size: 30px; color: var(--brand-darker); margin: 8px 0 12px; }
.section-head .lead { color: var(--ink-soft); font-size: 16px; }
.kicker {
  display: inline-block; color: var(--amber); font-size: 13px; font-weight: 700;
  letter-spacing: 1.5px; text-transform: uppercase;
}
.section-foot { text-align: center; margin-top: 30px; }

/* ---------- 三步(带迁徙虚线连接) ---------- */
.steps { display: flex; gap: 0; justify-content: center; flex-wrap: wrap; }
.step { flex: 1 1 240px; max-width: 320px; text-align: center; padding: 0 22px; position: relative; }
.step::after {
  content: ""; position: absolute; top: 34px; left: calc(50% + 44px); width: calc(100% - 88px);
  border-top: 2px dashed var(--mint); opacity: .5;
}
.step:last-child::after { display: none; }
.step-num {
  width: 68px; height: 68px; margin: 0 auto 18px; border-radius: 50%;
  background: var(--card); border: 2px solid var(--brand); color: var(--brand);
  display: flex; align-items: center; justify-content: center; font-size: 26px; font-weight: 800;
  box-shadow: 0 6px 16px rgba(14, 122, 90, .12); position: relative; z-index: 1;
}
.step h3 { font-size: 19px; color: var(--brand-darker); margin-bottom: 8px; }
.step p { color: var(--ink-soft); font-size: 15px; }

/* ---------- 功能条(横排) ---------- */
.feat-strip { display: flex; flex-direction: column; gap: 14px; max-width: 880px; margin: 0 auto; }
.feat-row {
  display: flex; align-items: flex-start; gap: 18px; background: var(--card);
  border: 1px solid var(--line); border-radius: var(--radius); padding: 20px 24px;
  transition: .2s;
}
.feat-row:hover { border-color: var(--mint); box-shadow: 0 8px 22px rgba(14, 122, 90, .08); transform: translateY(-2px); }
.feat-row .ico {
  flex: 0 0 50px; width: 50px; height: 50px; border-radius: 13px;
  background: var(--mint-soft); color: var(--brand); display: flex; align-items: center; justify-content: center;
}
.feat-row .ico svg { width: 26px; height: 26px; }
.feat-row h3 { font-size: 18px; color: var(--brand-darker); margin-bottom: 4px; }
.feat-row p { color: var(--ink-soft); font-size: 15px; }

/* ---------- 场景卡 ---------- */
.scene-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.scene-card {
  position: relative; border-radius: var(--radius); overflow: hidden; aspect-ratio: 4/3;
  background: var(--mint-soft);
}
.scene-card img { width: 100%; height: 100%; object-fit: cover; }
.scene-card .ov {
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(12, 43, 34, 0) 40%, rgba(12, 43, 34, .78) 100%);
}
.scene-card .txt { position: absolute; left: 18px; right: 18px; bottom: 16px; color: #fff; }
.scene-card .txt h4 { font-size: 18px; margin-bottom: 3px; }
.scene-card .txt p { font-size: 13px; opacity: .85; }

/* ---------- 左右图文 ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 46px; align-items: center; }
.split.rev .split-copy { order: 2; }
.split.rev .split-media { order: 1; }
.split-copy h3 { font-size: 26px; color: var(--brand-darker); margin-bottom: 14px; }
.split-copy p { color: var(--ink-soft); margin-bottom: 14px; }
.split-copy ul { list-style: none; margin: 16px 0; }
.split-copy li { padding: 6px 0 6px 28px; position: relative; color: var(--ink); }
.split-copy li::before {
  content: ""; position: absolute; left: 0; top: 12px; width: 9px; height: 9px;
  background: var(--amber); border-radius: 50%;
}
.split-media img { border-radius: var(--radius); box-shadow: 0 12px 30px rgba(12, 43, 34, .14); }

/* ---------- 平台列表行卡 ---------- */
.plat-list { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.plat-row {
  display: flex; align-items: center; gap: 16px; background: var(--card);
  border: 1px solid var(--line); border-radius: 12px; padding: 14px 18px; transition: .18s;
}
.plat-row:hover { border-color: var(--brand); transform: translateX(3px); }
.plat-row .platform-ico {
  flex: 0 0 44px; width: 44px; height: 44px; border-radius: 11px;
  background: var(--mint-soft); color: var(--brand); display: flex; align-items: center; justify-content: center;
}
.plat-row .platform-ico svg { width: 23px; height: 23px; }
.plat-row h3 { font-size: 16px; color: var(--brand-darker); }
.plat-row p { font-size: 13px; color: var(--ink-soft); }
.plat-row .go { margin-left: auto; color: var(--brand); font-weight: 700; white-space: nowrap; }

/* ---------- 表格 ---------- */
.tbl-wrap { overflow-x: auto; border-radius: var(--radius); border: 1px solid var(--line); background: var(--card); }
table { width: 100%; border-collapse: collapse; min-width: 520px; }
th, td { padding: 13px 18px; text-align: left; border-bottom: 1px solid var(--line); font-size: 15px; }
th { background: var(--mint-soft); color: var(--brand-darker); font-weight: 700; }
tr:last-child td { border-bottom: none; }
td.ok { color: var(--brand); font-weight: 600; }

/* ---------- 内页 hero ---------- */
.page-hero {
  background: linear-gradient(135deg, var(--mint-soft) 0%, #FDFAF1 100%);
  padding: 46px 0; border-bottom: 1px solid var(--line);
}
.page-hero h1 { font-size: 34px; color: var(--brand-darker); margin: 12px 0 8px; }
.page-hero .sub { color: var(--ink-soft); font-size: 16px; max-width: 720px; }
.center-hero { text-align: center; padding: 70px 24px; }
.center-hero h1 { font-size: 38px; color: var(--brand-darker); margin-bottom: 10px; }
.center-hero p { color: var(--ink-soft); }
.crumb { font-size: 13px; color: var(--ink-soft); margin-bottom: 6px; }
.crumb a { color: var(--brand-deep); }

/* ---------- FAQ ---------- */
.faq-list { max-width: 820px; margin: 0 auto; }
.faq-item { background: var(--card); border: 1px solid var(--line); border-radius: 12px; margin-bottom: 12px; overflow: hidden; }
.faq-q {
  width: 100%; text-align: left; background: none; border: none; cursor: pointer;
  font-size: 16px; font-weight: 600; color: var(--brand-darker); padding: 16px 20px;
  display: flex; justify-content: space-between; align-items: center; font-family: inherit;
}
.faq-q .plus { color: var(--brand); font-size: 22px; transition: .2s; }
.faq-item.open .faq-q .plus { transform: rotate(45deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .25s ease; }
.faq-item.open .faq-a { max-height: 400px; }
.faq-a p { padding: 0 20px 18px; color: var(--ink-soft); }

/* ---------- 文章 ---------- */
.article-body { padding: 48px 0; }
.article-body .wrap { display: grid; grid-template-columns: 260px 1fr; gap: 44px; align-items: start; }
.toc { position: sticky; top: 90px; background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 20px; }
.toc h4 { font-size: 14px; color: var(--brand-darker); margin-bottom: 12px; letter-spacing: 1px; }
.toc ul { list-style: none; }
.toc a { display: block; font-size: 14px; color: var(--ink-soft); padding: 6px 0; border-left: 2px solid transparent; padding-left: 12px; }
.toc a:hover { color: var(--brand); border-left-color: var(--amber); }
.article-content { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 38px 44px; }
.article-content .lead, .article-content .lead-p { font-size: 18px; color: var(--ink); margin-bottom: 22px; font-weight: 500; }
.article-content h2 { font-size: 23px; color: var(--brand-darker); margin: 30px 0 12px; padding-top: 8px; }
.article-content p { color: #35524B; margin-bottom: 14px; }
.art-meta { margin-top: 16px; font-size: 13px; color: var(--ink-soft); display: flex; gap: 20px; }
.article-content img { border-radius: 12px; margin: 20px 0; }
.tip {
  background: var(--amber-soft); border-left: 4px solid var(--amber); border-radius: 8px;
  padding: 14px 18px; margin: 22px 0; color: #7A4A14; font-size: 15px;
}
.article-cta {
  text-align: center; background: linear-gradient(135deg, var(--mint-soft), var(--amber-soft));
  border-radius: 12px; padding: 30px 24px; margin-top: 30px;
}
.article-cta h3 { color: var(--brand-darker); font-size: 22px; margin-bottom: 8px; }
.article-cta p { color: var(--ink-soft); margin-bottom: 18px; }

/* ---------- 相关卡片 / 搜索 ---------- */
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.related-card {
  display: block; background: var(--card); border: 1px solid var(--line); border-radius: 12px;
  padding: 18px 20px; transition: .18s;
}
.related-card:hover { border-color: var(--brand); box-shadow: 0 8px 20px rgba(14, 122, 90, .1); }
.related-card .cat { display: inline-block; font-size: 12px; color: var(--amber); font-weight: 700; margin-bottom: 8px; }
.related-card h4 { font-size: 16px; color: var(--brand-darker); }
.search-box input {
  width: 100%; max-width: 520px; padding: 15px 20px; font-size: 16px; border: 2px solid var(--line);
  border-radius: 999px; outline: none; background: var(--card); color: var(--ink);
}
.search-box input:focus { border-color: var(--brand); }
.search-results { margin-top: 28px; }

/* ---------- 最终 CTA ---------- */
.final-cta {
  text-align: center; background: linear-gradient(135deg, var(--brand) 0%, var(--brand-deep) 100%);
  color: #fff; border-radius: 20px; padding: 52px 30px;
}
.final-cta h2 { font-size: 30px; margin-bottom: 12px; }
.final-cta p { opacity: .9; margin-bottom: 24px; }
.final-cta .btn { background: #fff; color: var(--brand-darker); }
.final-cta .btn:hover { background: var(--amber-soft); }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--foot); color: var(--foot-ink); padding: 52px 0 0; margin-top: 20px; }
.foot-top { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 30px; padding-bottom: 34px; }
.foot-brand img { width: 42px; height: 42px; border-radius: 10px; margin-bottom: 14px; }
.foot-brand p { font-size: 14px; line-height: 1.8; }
.foot-col h4 { color: #fff; font-size: 15px; margin-bottom: 14px; }
.foot-col a { display: block; color: var(--foot-ink); font-size: 14px; padding: 5px 0; }
.foot-col a:hover { color: var(--amber); }
.foot-bot { text-align: center; border-top: 1px solid rgba(255,255,255,.08); padding: 18px; font-size: 13px; }

/* ---------- 返回顶部 ---------- */
#backtop {
  position: fixed; right: 26px; bottom: 26px; width: 46px; height: 46px; border-radius: 50%;
  background: var(--brand); color: #fff; border: none; cursor: pointer; font-size: 20px;
  opacity: 0; pointer-events: none; transition: .25s; box-shadow: 0 6px 16px rgba(14,122,90,.3);
}
#backtop.show { opacity: 1; pointer-events: auto; }
#backtop:hover { background: var(--brand-deep); }

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  .scene-grid { grid-template-columns: repeat(2, 1fr); }
  .split { grid-template-columns: 1fr; gap: 26px; }
  .split.rev .split-copy, .split.rev .split-media { order: 0; }
  .plat-list { grid-template-columns: 1fr; }
  .article-body .wrap { grid-template-columns: 1fr; }
  .toc { position: static; }
  .related-grid { grid-template-columns: repeat(2, 1fr); }
  .foot-top { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .nav-links, .nav-cta { display: none; }
  #menuBtn {
    display: flex; flex-direction: column; gap: 5px; margin-left: auto; background: none; border: none; cursor: pointer;
    width: 40px; height: 40px; align-items: center; justify-content: center;
  }
  #menuBtn span { display: block; width: 24px; height: 2px; background: var(--brand-darker); border-radius: 2px; }
  #nav.open { display: block; position: absolute; top: 68px; left: 0; right: 0; background: var(--bg); border-bottom: 1px solid var(--line); padding: 12px 24px; }
  #nav.open .nav-links { display: flex; flex-direction: column; gap: 2px; }
  #nav.open .nav-links a { display: block; padding: 12px; }
  #nav { display: none; }
  .scene-grid { grid-template-columns: 1fr; }
  .related-grid { grid-template-columns: 1fr; }
  .foot-top { grid-template-columns: 1fr; }
  .article-content { padding: 26px 22px; }
  .steps { flex-direction: column; gap: 26px; }
  .step::after { display: none; }
}