/* ============================================================
   《露娜2：拾光之约》官网样式
   风格：Q萌治愈 · 浅色马卡龙 · 月亮星空
   ============================================================ */

:root {
  --primary: #5b86e5;
  --primary-deep: #4668c9;
  --primary-soft: #e8f0ff;
  --pink: #ff8fab;
  --pink-soft: #ffe9f0;
  --purple: #9d8df1;
  --purple-soft: #f0ecff;
  --mint: #4fc9b0;
  --mint-soft: #e2f7f2;
  --yellow: #ffc95b;
  --yellow-soft: #fff5dc;

  --bg: #f6f9ff;
  --bg-warm: #fffaf3;
  --card: #ffffff;
  --ink: #2e3a59;
  --ink-dim: #697693;
  --ink-faint: #9aa6c0;
  --line: #e6ecf8;

  --shadow: 0 14px 36px rgba(80, 110, 180, 0.12);
  --shadow-soft: 0 6px 18px rgba(80, 110, 180, 0.08);
  --radius: 16px;
  --radius-lg: 24px;
  --maxw: 1180px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.75;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color .2s; }
ul { list-style: none; }
h1, h2, h3, h4 { font-weight: 700; line-height: 1.35; }

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 22px; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}

/* ---------- 通用按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 30px; border-radius: 999px; font-size: 16px; font-weight: 700;
  letter-spacing: 1px; cursor: pointer; border: none; transition: all .25s;
}
.btn-primary {
  background: linear-gradient(135deg, #6f9bf0 0%, var(--primary) 55%, var(--primary-deep) 100%);
  color: #fff; box-shadow: 0 8px 22px rgba(91, 134, 229, .35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 28px rgba(91, 134, 229, .48); }
.btn-pink {
  background: linear-gradient(135deg, #ffa6bd, var(--pink));
  color: #fff; box-shadow: 0 8px 22px rgba(255, 143, 171, .35);
}
.btn-pink:hover { transform: translateY(-2px); box-shadow: 0 12px 28px rgba(255, 143, 171, .45); }
.btn-ghost {
  background: #fff; color: var(--primary); border: 1.5px solid var(--primary);
}
.btn-ghost:hover { background: var(--primary-soft); }
.btn-block { width: 100%; }
.btn-lg { padding: 15px 42px; font-size: 18px; }

/* ---------- 标签 ---------- */
.tag {
  display: inline-block; padding: 3px 12px; border-radius: 999px;
  font-size: 13px; font-weight: 700; white-space: nowrap;
}
.tag-gg { background: var(--primary-soft); color: var(--primary-deep); }
.tag-xw { background: var(--purple-soft); color: var(--purple); }
.tag-hd { background: var(--pink-soft); color: #e0688a; }
.tag-lib { background: var(--yellow-soft); color: #d99a1f; }
.tag-gl { background: var(--mint-soft); color: #2a9c86; }

/* ============================================================
   顶部导航
   ============================================================ */
.header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  transition: all .3s; padding: 16px 0;
}
.header.scrolled {
  background: rgba(255, 255, 255, .92); backdrop-filter: blur(12px);
  box-shadow: 0 4px 20px rgba(80, 110, 180, .1); padding: 10px 0;
}
.nav { display: flex; align-items: center; justify-content: space-between; }
.nav-logo { display: flex; align-items: center; gap: 10px; font-size: 21px; font-weight: 800; color: #fff; }
.header.scrolled .nav-logo { color: var(--ink); }
.nav-logo .moon {
  width: 38px; height: 38px; border-radius: 50%;
  background: linear-gradient(135deg, var(--yellow), #ffb347);
  display: grid; place-items: center; color: #fff; font-size: 20px;
  box-shadow: 0 4px 12px rgba(255, 180, 71, .5);
}
.nav-menu { display: flex; gap: 6px; }
.nav-menu a {
  padding: 8px 18px; border-radius: 999px; font-size: 16px; font-weight: 600;
  color: rgba(255, 255, 255, .9);
}
.header.scrolled .nav-menu a { color: var(--ink-dim); }
.nav-menu a:hover, .nav-menu a.active {
  background: rgba(255, 255, 255, .2); color: #fff;
}
.header.scrolled .nav-menu a:hover, .header.scrolled .nav-menu a.active {
  background: var(--primary-soft); color: var(--primary-deep);
}
.nav-toggle { display: none; background: none; border: none; cursor: pointer; width: 40px; height: 40px; }
.nav-toggle span {
  display: block; width: 24px; height: 2.5px; margin: 5px auto;
  background: #fff; border-radius: 2px; transition: .3s;
}
.header.scrolled .nav-toggle span { background: var(--ink); }

/* ============================================================
   首屏
   ============================================================ */
.hero {
  position: relative; min-height: 100vh; display: flex; align-items: center;
  text-align: center; color: #fff; overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0;
  background-size: cover; background-position: center;
}
.hero-bg::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(46, 70, 140, .55) 0%, rgba(70, 100, 190, .35) 45%, rgba(246, 249, 255, .92) 100%);
}
.hero-inner { position: relative; z-index: 2; margin: 0 auto; padding: 120px 22px 60px; max-width: 820px; }
.hero-badge {
  display: inline-block; padding: 6px 20px; border-radius: 999px;
  background: rgba(255, 255, 255, .2); border: 1px solid rgba(255, 255, 255, .4);
  font-size: 14px; font-weight: 600; margin-bottom: 22px; backdrop-filter: blur(6px);
}
.hero h1 { font-size: 52px; font-weight: 800; text-shadow: 0 4px 24px rgba(30, 50, 110, .4); margin-bottom: 14px; }
.hero .hero-sub { font-size: 20px; color: rgba(255, 255, 255, .95); margin-bottom: 10px; }
.hero .hero-date {
  font-size: 17px; font-weight: 700; color: #fff1c9; margin-bottom: 32px;
}
.hero-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.hero-wave {
  position: absolute; bottom: -1px; left: 0; right: 0; z-index: 2; line-height: 0;
}
.hero-wave svg { width: 100%; height: 70px; display: block; }

/* ============================================================
   通用板块
   ============================================================ */
.section { padding: 78px 0; }
.section.tint { background: var(--card); }
.section.warm { background: var(--bg-warm); }
.section-head { text-align: center; margin-bottom: 48px; }
.section-head h2 { font-size: 34px; color: var(--ink); }
.section-head p { color: var(--ink-faint); font-size: 15px; letter-spacing: 3px; margin-top: 6px; text-transform: uppercase; }
.section-head .deco {
  width: 56px; height: 4px; border-radius: 2px; margin: 14px auto 0;
  background: linear-gradient(90deg, var(--primary), var(--purple));
}

/* ---------- 特色网格 ---------- */
.feature-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px;
}
.feature-card {
  background: var(--card); border-radius: var(--radius-lg); overflow: hidden;
  box-shadow: var(--shadow-soft); transition: all .3s; border: 1px solid var(--line);
}
.feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.feature-card .thumb { aspect-ratio: 16/10; overflow: hidden; }
.feature-card .thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s; }
.feature-card:hover .thumb img { transform: scale(1.06); }
.feature-card .body { padding: 22px 24px 26px; }
.feature-card h3 { font-size: 20px; margin-bottom: 8px; }
.feature-card p { color: var(--ink-dim); font-size: 15px; }
.feature-card .chips { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 14px; }
.feature-card .chips span {
  font-size: 12.5px; padding: 3px 11px; border-radius: 999px;
  background: var(--primary-soft); color: var(--primary-deep); font-weight: 600;
}

/* ---------- 图文交替（特色系统） ---------- */
.sys-row {
  display: grid; grid-template-columns: 1fr 1fr; gap: 44px; align-items: center;
  margin-bottom: 60px;
}
.sys-row:last-child { margin-bottom: 0; }
.sys-row.reverse .sys-img { order: 2; }
.sys-img { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow); }
.sys-img img { width: 100%; }
.sys-text h3 { font-size: 26px; margin-bottom: 14px; }
.sys-text .en { color: var(--primary); font-weight: 700; font-size: 14px; letter-spacing: 2px; margin-bottom: 10px; }
.sys-text p { color: var(--ink-dim); margin-bottom: 16px; }

/* ---------- 职业卡片 ---------- */
.class-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.class-card {
  background: var(--card); border-radius: var(--radius-lg); padding: 30px 26px;
  border: 1px solid var(--line); box-shadow: var(--shadow-soft); transition: all .3s;
}
.class-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.class-icon {
  width: 64px; height: 64px; border-radius: 18px; display: grid; place-items: center;
  font-size: 30px; margin-bottom: 18px;
}
.class-card:nth-child(1) .class-icon { background: var(--primary-soft); }
.class-card:nth-child(2) .class-icon { background: var(--pink-soft); }
.class-card:nth-child(3) .class-icon { background: var(--purple-soft); }
.class-card h3 { font-size: 22px; margin-bottom: 10px; }
.class-card p { color: var(--ink-dim); font-size: 15px; }
.class-card .meta { margin-top: 14px; font-size: 13.5px; color: var(--ink-faint); }

/* ---------- 画廊（场景/玩法） ---------- */
.gallery { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.gallery .g-item {
  border-radius: var(--radius); overflow: hidden; position: relative;
  box-shadow: var(--shadow-soft); aspect-ratio: 4/3;
}
.gallery .g-item img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s; }
.gallery .g-item:hover img { transform: scale(1.07); }
.gallery .g-cap {
  position: absolute; left: 12px; bottom: 12px; color: #fff; font-weight: 700;
  font-size: 15px; text-shadow: 0 2px 8px rgba(0, 0, 0, .5);
}

/* ---------- 资讯列表 ---------- */
.news-list { display: flex; flex-direction: column; gap: 12px; }
.news-item {
  display: flex; align-items: center; gap: 16px; padding: 16px 22px;
  background: var(--card); border-radius: var(--radius); border: 1px solid var(--line);
  transition: all .25s;
}
.news-item:hover { transform: translateX(6px); box-shadow: var(--shadow-soft); border-color: var(--primary); }
.news-item .title { flex: 1; font-weight: 600; font-size: 16px; }
.news-item .date { color: var(--ink-faint); font-size: 14px; white-space: nowrap; }

/* 分类 tab */
.tabs { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; margin-bottom: 34px; }
.tabs button {
  padding: 8px 24px; border-radius: 999px; border: 1.5px solid var(--line);
  background: #fff; color: var(--ink-dim); font-weight: 600; cursor: pointer; transition: all .2s;
}
.tabs button.active, .tabs button:hover { background: var(--primary); border-color: var(--primary); color: #fff; }

/* ============================================================
   内页（面包屑 + 文章）
   ============================================================ */
.page-hero {
  position: relative; color: var(--primary-deep);
  padding: 132px 0 64px; text-align: center; overflow: hidden;
  background: url("../images/sky-banner.jpg") center/cover no-repeat;
}
.page-hero::before {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(255, 255, 255, .55) 0%, rgba(236, 243, 255, .72) 100%);
}
.page-hero .container { position: relative; z-index: 2; }
.page-hero h1 {
  font-size: 38px; color: var(--primary-deep);
  text-shadow: 0 2px 14px rgba(255, 255, 255, .9);
}
.page-hero p { color: var(--primary); margin-top: 8px; font-weight: 700; letter-spacing: 2px; }
.breadcrumb { padding: 18px 0; font-size: 14px; color: var(--ink-faint); }
.breadcrumb a:hover { color: var(--primary); }

.layout { display: grid; grid-template-columns: 1fr 300px; gap: 36px; padding: 30px 0 70px; }
.article-card {
  background: var(--card); border-radius: var(--radius-lg); padding: 38px 42px;
  border: 1px solid var(--line); box-shadow: var(--shadow-soft);
}
.article-card h2 { font-size: 24px; margin: 26px 0 12px; }
.article-card h3 { font-size: 19px; margin: 22px 0 10px; }
.article-card p { margin-bottom: 14px; color: var(--ink); }
.article-card .lead-img { border-radius: var(--radius); margin: 18px 0; }
.article-meta { color: var(--ink-faint); font-size: 14px; padding-bottom: 18px; border-bottom: 1px solid var(--line); }
.article-card ul.art-ul { margin: 6px 0 16px; }
.article-card ul.art-ul li {
  position: relative; padding-left: 22px; margin-bottom: 8px; color: var(--ink);
}
.article-card ul.art-ul li::before {
  content: ""; position: absolute; left: 4px; top: 12px; width: 8px; height: 8px;
  border-radius: 50%; background: var(--primary);
}
.side-box {
  background: var(--card); border-radius: var(--radius-lg); padding: 24px 26px;
  border: 1px solid var(--line); box-shadow: var(--shadow-soft); margin-bottom: 24px;
}
.side-box h4 { font-size: 17px; margin-bottom: 16px; padding-left: 12px; border-left: 4px solid var(--primary); }
.side-rank li { margin-bottom: 12px; font-size: 14.5px; }
.side-rank .num {
  display: inline-grid; place-items: center; width: 22px; height: 22px; border-radius: 6px;
  background: var(--primary-soft); color: var(--primary-deep); font-weight: 700;
  font-size: 12.5px; margin-right: 8px;
}
.side-rank li:nth-child(1) .num, .side-rank li:nth-child(2) .num, .side-rank li:nth-child(3) .num {
  background: var(--pink); color: #fff;
}
.side-rank a { color: var(--ink-dim); }
.side-rank a:hover { color: var(--primary); }

/* ============================================================
   下载页
   ============================================================ */
.dl-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-bottom: 50px; }
.dl-card {
  background: var(--card); border-radius: var(--radius-lg); padding: 34px 26px;
  text-align: center; border: 1px solid var(--line); box-shadow: var(--shadow-soft);
}
.dl-card .dl-ico { font-size: 46px; margin-bottom: 14px; }
.dl-card h3 { font-size: 20px; margin-bottom: 8px; }
.dl-card p { color: var(--ink-dim); font-size: 14px; margin-bottom: 20px; }
.req-table { width: 100%; border-collapse: collapse; background: var(--card); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-soft); }
.req-table th, .req-table td { padding: 15px 22px; text-align: left; border-bottom: 1px solid var(--line); }
.req-table th { background: var(--primary-soft); color: var(--primary-deep); width: 180px; font-weight: 700; }
.req-table tr:last-child td, .req-table tr:last-child th { border-bottom: none; }

/* ============================================================
   页脚
   ============================================================ */
.footer {
  background: #2b3a63; color: #c6d0e8; padding: 56px 0 28px; margin-top: 0;
}
.footer-top { display: flex; justify-content: space-between; gap: 40px; flex-wrap: wrap; margin-bottom: 36px; }
.footer-brand { max-width: 360px; }
.footer-brand .f-logo { display: flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 800; color: #fff; margin-bottom: 14px; }
.footer-brand p { font-size: 14px; color: #9fabcb; }
.footer-links { display: flex; gap: 60px; flex-wrap: wrap; }
.footer-links h5 { color: #fff; font-size: 16px; margin-bottom: 14px; }
.footer-links a { display: block; font-size: 14px; color: #9fabcb; margin-bottom: 9px; }
.footer-links a:hover { color: #fff; }
.footer-wx { font-size: 14px; color: #5fd98a; margin: 4px 0 0; font-weight: 600; }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .1); padding-top: 24px;
  font-size: 13px; color: #8593b3; text-align: center; line-height: 2;
}
.footer-bottom a:hover { color: #fff; }

/* ---------- 弹窗 ---------- */
.modal {
  position: fixed; inset: 0; z-index: 200; display: none;
  background: rgba(35, 45, 80, .55); backdrop-filter: blur(4px);
  padding: 30px; align-items: center; justify-content: center;
}
.modal.open { display: flex; }
.modal-box {
  background: #fff; border-radius: var(--radius-lg); max-width: 560px; width: 100%;
  padding: 34px 36px; position: relative; max-height: 86vh; overflow-y: auto;
}
.modal-box h3 { font-size: 22px; margin-bottom: 14px; text-align: center; }
.modal-box p { color: var(--ink-dim); font-size: 15px; }
.modal-close {
  position: absolute; top: 16px; right: 20px; background: none; border: none;
  font-size: 26px; color: var(--ink-faint); cursor: pointer; line-height: 1;
}
.modal-close:hover { color: var(--ink); }

/* ---------- 官方 logo 图片 ---------- */
.nav-logo img { height: 42px; width: auto; }
.f-logo img { height: 48px; width: auto; }
.f-logo .logo-text { font-size: 18px; }

/* ---------- 弹窗二维码 ---------- */
.modal-box .qr-img {
  width: 250px; margin: 18px auto 8px; border-radius: 12px;
  border: 1px solid var(--line);
}
.modal-box .modal-tip { text-align: center; color: var(--ink-faint); font-size: 14px; }
.modal-box .modal-tip strong { color: var(--primary-deep); }

/* ---------- 客服微信号 ---------- */
.wechat-id {
  margin-top: 14px;
  text-align: center;
  background: linear-gradient(135deg, #e9f9ef, #d9f3e4);
  border: 1px dashed #35c759;
  border-radius: 12px;
  padding: 10px 14px;
  color: #1c7d3e;
  font-size: 14px;
}
.wechat-id strong { font-size: 18px; letter-spacing: 1px; color: #159447; margin-left: 4px; }
.contact-card {
  display: flex; align-items: center; gap: 14px;
  background: linear-gradient(135deg, #eef6ff, #f3e9ff);
  border: 1px solid var(--line);
  border-radius: 16px; padding: 18px 20px; margin-top: 26px;
}
.contact-card .cc-ico {
  width: 48px; height: 48px; flex: 0 0 48px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  background: #d8f3e3; font-size: 24px;
}
.contact-card h4 { margin-bottom: 4px; }
.contact-card p { color: var(--ink-dim); font-size: 14px; margin: 0; }
.contact-card .wx { color: #159447; font-weight: 700; font-size: 17px; letter-spacing: .5px; }

/* ---------- 侧边栏下载按钮 ---------- */
.side-dl { width: 100%; margin-top: 4px; }
.side-wx { margin: 10px 0 0; font-size: 13px; color: var(--ink-dim); text-align: center; }
.side-wx strong { color: #159447; letter-spacing: .5px; }

/* ---------- 文章详情导航 ---------- */
.post-nav {
  display: flex; justify-content: space-between; gap: 16px; margin-top: 34px;
  padding-top: 22px; border-top: 1px solid var(--line); font-size: 14.5px;
}
.post-nav a { color: var(--ink-dim); font-weight: 600; }
.post-nav a:hover { color: var(--primary); }

/* ---------- 下载按钮（弹窗触发） ---------- */
.js-dl { cursor: pointer; }

/* ---------- 入场动画 ---------- */
.fade-up { opacity: 0; transform: translateY(28px); transition: opacity .7s ease, transform .7s ease; }
.fade-up.show { opacity: 1; transform: none; }

/* ============================================================
   职业详细卡片（带立绘）
   ============================================================ */
.job-card {
  background: var(--card); border-radius: var(--radius-lg);
  border: 1px solid var(--line); box-shadow: var(--shadow-soft);
  overflow: hidden; transition: all .3s; height: 100%;
}
.job-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.job-card .job-art {
  aspect-ratio: 760/470; display: grid; place-items: center; padding: 14px 14px 0;
  background: linear-gradient(180deg, #e9f1ff 0%, #f8fbff 100%);
}
.job-card .job-art img { max-height: 100%; width: auto; }
.job-card .job-body { padding: 22px 26px 28px; }
.job-card h3 { font-size: 23px; margin-bottom: 10px; }
.job-card .job-tags { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 12px; }
.job-card .job-tags span {
  font-size: 12.5px; font-weight: 700; padding: 3px 12px; border-radius: 999px;
  background: var(--primary-soft); color: var(--primary-deep);
}
.job-card .job-tags span.pink { background: var(--pink-soft); color: #e0688a; }
.job-card .job-tags span.purple { background: var(--purple-soft); color: var(--purple); }
.job-card p { color: var(--ink-dim); font-size: 14.5px; }
.job-card p + p { margin-top: 8px; }

/* ============================================================
   转职树（三转路径）
   ============================================================ */
.tree-block {
  background: var(--card); border-radius: var(--radius-lg);
  border: 1px solid var(--line); box-shadow: var(--shadow-soft);
  padding: 26px 28px 14px; margin-bottom: 24px;
}
.tree-block > h3 {
  font-size: 21px; margin-bottom: 16px; padding-left: 12px;
  border-left: 4px solid var(--primary);
}
.tier-row {
  display: grid; grid-template-columns: 76px 1fr; gap: 16px; align-items: center;
  padding: 12px 0; border-bottom: 1px dashed var(--line);
}
.tier-row:last-child { border-bottom: none; }
.tier-badge {
  text-align: center; font-size: 13px; font-weight: 800; color: #fff;
  padding: 6px 0; border-radius: 10px; letter-spacing: 1px;
}
.tier-badge.t1 { background: linear-gradient(135deg, #7ba6f2, var(--primary)); }
.tier-badge.t2 { background: linear-gradient(135deg, #b3a6f5, var(--purple)); }
.tier-badge.t3 { background: linear-gradient(135deg, #ffa6bd, var(--pink)); }
.chip-group { display: flex; gap: 8px; flex-wrap: wrap; }
.chip-group .jc {
  font-size: 13.5px; font-weight: 600; padding: 5px 14px; border-radius: 999px;
  background: var(--primary-soft); color: var(--primary-deep);
}
.chip-group .jc.elf { background: var(--purple-soft); color: var(--purple); }
.tree-note { font-size: 13.5px; color: var(--ink-faint); margin-top: 6px; }

/* ============================================================
   编号标题 & 云朵分隔
   ============================================================ */
.section-num { display: flex; align-items: center; gap: 14px; margin-bottom: 30px; }
.section-num .num-box {
  font-size: 26px; font-weight: 800; color: #fff; line-height: 1;
  background: linear-gradient(135deg, #6f9bf0, var(--primary));
  padding: 12px 16px; border-radius: 14px;
  box-shadow: 0 6px 16px rgba(91, 134, 229, .3);
}
.section-num h2 { font-size: 27px; }
.section-num .sub { color: var(--ink-faint); font-size: 13px; font-weight: 600; letter-spacing: 2px; }

.cloud-divider { line-height: 0; margin: 0; }
.cloud-divider img { width: 100%; }

/* 信息提示条 */
.info-banner {
  display: flex; gap: 14px; align-items: flex-start;
  background: var(--primary-soft); border-radius: var(--radius);
  padding: 22px 26px; margin-bottom: 28px;
}
.info-banner .ib-ico { font-size: 26px; line-height: 1.3; }
.info-banner h4 { font-size: 16px; margin-bottom: 4px; color: var(--primary-deep); }
.info-banner p { font-size: 14px; color: var(--ink-dim); margin: 0; }

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 980px) {
  .feature-grid, .class-grid, .dl-grid { grid-template-columns: repeat(2, 1fr); }
  .gallery { grid-template-columns: repeat(2, 1fr); }
  .layout { grid-template-columns: 1fr; }
  .sys-row { grid-template-columns: 1fr; gap: 24px; }
  .sys-row.reverse .sys-img { order: 0; }
  .hero h1 { font-size: 42px; }
}

@media (max-width: 760px) {
  .nav-toggle { display: block; }
  .nav-menu {
    position: fixed; top: 0; right: -78%; width: 76%; height: 100vh;
    background: #fff; flex-direction: column; padding: 90px 28px; gap: 8px;
    transition: right .35s; box-shadow: -8px 0 30px rgba(0, 0, 0, .12);
  }
  .nav-menu.open { right: 0; }
  .nav-menu a { color: var(--ink-dim); }
  .nav-menu a:hover, .nav-menu a.active { background: var(--primary-soft); color: var(--primary-deep); }
  .feature-grid, .class-grid, .dl-grid, .gallery { grid-template-columns: 1fr; }
  .section { padding: 56px 0; }
  .section-head h2 { font-size: 27px; }
  .hero h1 { font-size: 34px; }
  .hero .hero-sub { font-size: 17px; }
  .article-card { padding: 26px 22px; }
  .news-item { flex-wrap: wrap; gap: 8px; }
  .news-item .title { flex-basis: 100%; }
  .footer-top { flex-direction: column; gap: 28px; }
  .tier-row { grid-template-columns: 1fr; gap: 8px; }
  .tier-badge { width: 80px; }
  .page-hero h1 { font-size: 29px; }
  .section-num { gap: 10px; }
  .section-num h2 { font-size: 22px; }
  .tree-block { padding: 20px 18px 10px; }
}