/* ===== 订阅站通用样式（仅作用于新增类，不干扰交互版自身样式） =====
   移动端响应式规则统一放 mobile.css，须在 style.css 之后以 <link> 引入
   （@import 会被本文件同优先级规则覆盖，故不可用） */
* { box-sizing: border-box; }
body { font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif; }

/* 顶栏会员状态 */
.authstate { font-size: 12px; color: #64748b; margin-left: 6px; }
.authstate a { color: #6d28d9; text-decoration: none; font-weight: 700; }
.authstate a:hover { text-decoration: underline; }

/* 会员态：隐藏导航「激活会员」入口（auth.js 解锁后会给 body 加 .member） */
.member .nav-activate { display: none; }

/* 免费用户看到的"会员专享"锁卡 */
.lockcard {
  margin-top: 10px; padding: 18px 20px; border-radius: 12px;
  background: linear-gradient(135deg, #f5f3ff, #ede9fe);
  border: 1px dashed #8b5cf6; color: #4c1d95; font-size: 14px; line-height: 1.7;
}
.lockcard b { font-size: 15px; }
.lockcard button {
  margin-top: 12px; background: linear-gradient(135deg, #7c3aed, #6d28d9);
  color: #fff; border: none; padding: 10px 22px; border-radius: 22px;
  cursor: pointer; font-size: 14px; font-weight: 700;
}
.lockcard button:hover { filter: brightness(1.05); }

/* ===== 落地页 / 登录页 ===== */
.landing, .loginwrap { max-width: 920px; margin: 0 auto; padding: 0 22px 60px; }
.nav { display: flex; align-items: center; justify-content: space-between; padding: 16px 22px; }
.nav .logo { font-weight: 800; font-size: 18px; color: #0f172a; }
.nav a { color: #6d28d9; text-decoration: none; font-weight: 700; margin-left: 18px; }
.hero { text-align: center; padding: 56px 16px 30px; }
.hero h1 { font-size: 34px; margin: 0 0 14px; color: #0f172a; line-height: 1.35; }
.hero p { font-size: 16px; color: #475569; max-width: 620px; margin: 0 auto 26px; line-height: 1.8; }
.cta { display: inline-block; background: linear-gradient(135deg, #7c3aed, #6d28d9); color: #fff;
  padding: 14px 34px; border-radius: 28px; text-decoration: none; font-weight: 700; font-size: 16px; }
.cta.ghost { background: #fff; color: #6d28d9; border: 1px solid #c4b5fd; margin-left: 12px; }
.cta:hover { filter: brightness(1.05); }
.features { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin: 40px 0; }
.feature { background: #fff; border: 1px solid #e2e8f0; border-radius: 14px; padding: 20px 22px; }
.feature .ic { font-size: 26px; }
.feature h3 { margin: 8px 0 6px; font-size: 17px; color: #0f172a; }
.feature p { margin: 0; color: #475569; font-size: 14px; line-height: 1.7; }
.tiers { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin: 30px 0; }
.tier { border-radius: 16px; padding: 26px 24px; }
.tier.free { background: #f8fafc; border: 1px solid #e2e8f0; }
.tier.pro { background: linear-gradient(135deg, #f5f3ff, #ede9fe); border: 1px solid #c4b5fd; }
.tier h3 { margin: 0 0 6px; font-size: 20px; color: #0f172a; }
.tier .price { font-size: 30px; font-weight: 800; color: #6d28d9; margin: 8px 0; }
.tier ul { margin: 10px 0 18px; padding-left: 18px; color: #475569; font-size: 14px; line-height: 1.9; }
.foot { text-align: center; color: #94a3b8; font-size: 13px; margin-top: 40px; }

.loginwrap { max-width: 420px; padding-top: 80px; }
.loginwrap h2 { text-align: center; color: #0f172a; font-size: 26px; margin-bottom: 6px; }
.loginwrap .sub { text-align: center; color: #64748b; font-size: 14px; margin-bottom: 26px; }
.loginwrap label { display: block; font-size: 13px; color: #334155; margin: 14px 0 6px; }
.loginwrap input { width: 100%; padding: 12px 14px; border: 1px solid #cbd5e1; border-radius: 10px; font-size: 15px; }
.loginwrap button { width: 100%; margin-top: 22px; background: linear-gradient(135deg, #7c3aed, #6d28d9);
  color: #fff; border: none; padding: 13px; border-radius: 24px; font-size: 15px; font-weight: 700; cursor: pointer; }
.loginwrap button:hover { filter: brightness(1.05); }
.loginwrap .msg { text-align: center; margin-top: 14px; font-size: 13px; min-height: 18px; }
.loginwrap .msg.ok { color: #16a34a; }
.loginwrap .msg.err { color: #dc2626; }
.loginwrap .demo { text-align: center; margin-top: 18px; font-size: 13px; color: #64748b; }
.loginwrap .demo code { background: #f1f5f9; padding: 2px 8px; border-radius: 6px; color: #6d28d9; }

/* ===== 落地页「全部章节」预览区 ===== */
.chappreview { background: linear-gradient(135deg, #faf5ff, #f5f3ff); border: 1px solid #e9d5ff;
  border-radius: 16px; padding: 30px 28px; margin: 10px 0 30px; text-align: center; }
.chappreview h2 { margin: 0 0 10px; font-size: 22px; color: #0f172a; }
.chappreview p { color: #475569; font-size: 15px; line-height: 1.8; max-width: 680px; margin: 0 auto 20px; }

/* ===== 章节商城 catalog ===== */
.catalog { max-width: 1040px; margin: 0 auto; padding: 0 22px 60px; }
.cathero { text-align: center; padding: 48px 16px 18px; }
.cathero h1 { font-size: 30px; margin: 0 0 12px; color: #0f172a; }
.cathero p { color: #475569; font-size: 15px; line-height: 1.8; max-width: 660px; margin: 0 auto; }
.secttl { font-size: 19px; color: #0f172a; margin: 38px 0 16px; padding-left: 10px; border-left: 4px solid #7c3aed; }
.chapgrid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; }
.chapcard { background: #fff; border: 1px solid #e2e8f0; border-radius: 14px; padding: 18px 20px;
  display: flex; flex-direction: column; transition: box-shadow .15s, transform .15s; }
.chapcard:hover { box-shadow: 0 8px 24px rgba(124,58,237,.12); transform: translateY(-2px); }
.chaphead { display: flex; align-items: center; justify-content: space-between; margin-bottom: 8px; }
.chaphead .grade { font-size: 12px; color: #64748b; font-weight: 700; }
.badge { font-size: 11px; font-weight: 700; padding: 3px 10px; border-radius: 20px; }
.badge.ready { background: #dcfce7; color: #15803d; }
.badge.soon { background: #f1f5f9; color: #64748b; }
.chapcard h3 { margin: 0 0 8px; font-size: 16px; color: #0f172a; line-height: 1.4; }
.chapcard .blurb { font-size: 13px; color: #475569; line-height: 1.7; margin: 0 0 12px; flex: 1; }
.chapcard .tags { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 14px; }
.chapcard .tag { font-size: 12px; color: #6d28d9; background: #f5f3ff; border: 1px solid #e9d5ff;
  padding: 2px 9px; border-radius: 12px; }
.chapcard .chapfoot { margin-top: auto; }
.chapcard .chapfoot .cta { padding: 10px 20px; font-size: 14px; }
.chapcard .chapfoot .cta.ghost { margin-left: 0; }

/* ===== 落地页「宏观课程地图」 ===== */
.curric { background: linear-gradient(135deg, #f0f9ff, #f5f3ff); border: 1px solid #e9d5ff;
  border-radius: 16px; padding: 30px 28px; margin: 10px 0 30px; }
.curric-intro { color: #475569; font-size: 15px; line-height: 1.8; max-width: 760px; margin: 0 0 22px; }
.curric-intro b { color: #0f172a; }
.domains { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 16px; }
.domain { background: #fff; border: 1px solid #e2e8f0; border-radius: 14px; padding: 16px 18px; }
.domain .dhead { font-size: 15px; font-weight: 800; color: #0f172a; margin-bottom: 12px;
  padding-left: 10px; border-left: 4px solid #7c3aed; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip { font-size: 13px; color: #6d28d9; background: #f5f3ff; border: 1px solid #e9d5ff;
  padding: 6px 12px; border-radius: 20px; text-decoration: none; transition: .12s; }
.chip:hover { background: #7c3aed; color: #fff; }
.path { margin-top: 22px; padding: 14px 16px; background: #fff; border: 1px dashed #c4b5fd;
  border-radius: 12px; color: #4c1d95; font-size: 14px; line-height: 1.9; }
.path b { color: #6d28d9; }

/* 首页：科目域内按教材册次分组（sync_homepage.py 生成） */
.dommeta { float: right; font-size: 12px; font-weight: 600; color: #64748b; }
.bookgrp { margin-top: 10px; }
.bookgrp:first-of-type { margin-top: 0; }
.bookttl { font-size: 12px; color: #94a3b8; font-weight: 600; margin-bottom: 6px; }
.chips { display: flex; flex-wrap: wrap; gap: 7px; }

/* ===== 全站页脚（合规入口：隐私政策 / 服务条款 / 退款说明） ===== */
.site-foot { margin-top: 46px; border-top: 1px solid #e2e8f0; background: #fff;
  padding: 26px 22px 30px; text-align: center; color: #64748b; font-size: 13px; }
.site-foot .foot-links { display: flex; gap: 20px; justify-content: center;
  flex-wrap: wrap; margin-bottom: 12px; }
.site-foot .foot-links a { color: #475569; text-decoration: none; transition: .12s; }
.site-foot .foot-links a:hover { color: #6366f1; }
.site-foot .foot-note { color: #94a3b8; line-height: 1.8; }
.site-foot .foot-note a { color: #94a3b8; text-decoration: underline; }

/* ===== 文档型页面（隐私政策 / 服务条款 / 退款说明） ===== */
.doc { max-width: 820px; margin: 0 auto; padding: 34px 22px 0; line-height: 1.9; color: #334155; }
.doc h1 { font-size: 26px; color: #0f172a; margin: 0 0 6px; }
.doc .upd { color: #94a3b8; font-size: 13px; margin-bottom: 24px; }
.doc h2 { font-size: 18px; color: #0f172a; margin: 30px 0 8px;
  padding-left: 11px; border-left: 4px solid #6366f1; }
.doc h3 { font-size: 15px; color: #0f172a; margin: 20px 0 6px; }
.doc p, .doc li { font-size: 15px; }
.doc ul, .doc ol { padding-left: 22px; }
.doc .box { background: #f8fafc; border: 1px solid #e2e8f0; border-radius: 12px;
  padding: 14px 18px; margin: 16px 0; }
.doc .box.warn { background: #fff7ed; border-color: #fed7aa; color: #9a3412; }
.doc a { color: #2563eb; }