/* ============================================================
   AI 运营帮 · 落地页纯静态版共享样式
   手写 CSS（零框架零构建），teal 视觉体系与既有产品一致
   ============================================================ */

/* ---------- 基础 ---------- */
:root {
  --teal-900: #134e4a;
  --teal-800: #115e59;
  --teal-700: #0f766e;
  --teal-600: #0d9488;
  --teal-500: #14b8a6;
  --teal-300: #5eead4;
  --teal-200: #99f6e4;
  --teal-100: #ccfbf1;
  --teal-50: #f0fdfa;
  --slate-900: #0f172a;
  --slate-800: #1e293b;
  --slate-700: #334155;
  --slate-600: #475569;
  --slate-500: #64748b;
  --slate-400: #94a3b8;
  --slate-300: #cbd5e1;
  --slate-200: #e2e8f0;
  --slate-100: #f1f5f9;
  --slate-50: #f8fafc;
  --green-500: #22c55e;
  --green-100: #dcfce7;
  --green-700: #15803d;
  --amber-500: #f59e0b;
  --amber-600: #d97706;
  --red-400: #f87171;
  --yellow-400: #facc15;
  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 16px;
  --shadow-card: 0 1px 3px rgba(15, 23, 42, .06), 0 8px 24px -8px rgba(15, 23, 42, .08);
  --shadow-lg: 0 10px 30px -6px rgba(15, 23, 42, .12);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--slate-900);
  background: radial-gradient(ellipse at top, #ecfdf5 0%, #f8fafc 45%, #fff 100%);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; }
.container { max-width: 1080px; margin: 0 auto; padding: 0 20px; }
.hidden { display: none !important; }

/* ---------- 通用组件 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  font-size: 15px; font-weight: 500; padding: 12px 24px; border-radius: var(--radius-sm);
  text-decoration: none; transition: all .2s; cursor: pointer; border: none; line-height: 1.4;
}
.btn-primary { background: linear-gradient(135deg, var(--teal-600), var(--teal-700)); color: #fff; box-shadow: 0 4px 12px rgba(13, 148, 136, .25); }
.btn-primary:hover { filter: brightness(1.08); box-shadow: 0 6px 16px rgba(13, 148, 136, .35); }
.btn-outline { background: #fff; color: var(--slate-700); border: 1px solid var(--slate-300); }
.btn-outline:hover { background: var(--slate-50); }
.btn-dark-ghost { background: transparent; color: #fff; border: 1px solid var(--slate-500); }
.btn-dark-ghost:hover { background: rgba(255,255,255,.1); }
.btn-teal { background: var(--teal-700); color: #fff; }
.btn-teal:hover { background: var(--teal-800); }
.btn-block { width: 100%; }

.card {
  background: #fff; border: 1px solid var(--slate-200); border-radius: var(--radius);
  transition: border-color .2s, box-shadow .2s;
}
.card-hover:hover { border-color: var(--teal-300); box-shadow: var(--shadow-card); }

.section { border-top: 1px solid rgba(226, 232, 240, .6); }
.section-white { background: rgba(255,255,255,.6); }
.section-tint { background: linear-gradient(to right, rgba(240,253,250,.6), rgba(236,254,255,.6)); }
.section-gray { background: rgba(248,250,252,.6); }
.section-dark { background: linear-gradient(135deg, var(--slate-900), var(--slate-900) 55%, var(--teal-950, #042f2e)); color: #fff; }
.section-pad { padding: 64px 0; }

.section-head { text-align: center; margin-bottom: 40px; }
.section-head h2 { font-size: 30px; font-weight: 700; letter-spacing: -.02em; }
.section-head p { margin-top: 8px; color: var(--slate-600); }
.section-head .sub-sm { margin-top: 6px; font-size: 12px; color: var(--slate-400); }

.badge {
  display: inline-block; font-size: 13px; padding: 4px 12px; border-radius: 999px;
  background: var(--teal-50); color: var(--teal-700); border: 1px solid var(--teal-100);
}
.eyebrow { font-size: 13px; font-weight: 600; letter-spacing: .2em; text-transform: uppercase; color: var(--teal-700); }

/* ---------- 头部 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.6); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid transparent; transition: background .3s, box-shadow .3s, border-color .3s;
}
.site-header.scrolled { background: rgba(255,255,255,.85); backdrop-filter: blur(24px); -webkit-backdrop-filter: blur(24px); border-bottom-color: rgba(226,232,240,.6); box-shadow: 0 4px 6px -1px rgba(15,23,42,.05); }
.nav { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 16px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; letter-spacing: -.02em; color: var(--slate-900); text-decoration: none; flex-shrink: 0; }
.logo img { width: 36px; height: 36px; border-radius: 8px; transition: transform .2s; }
.logo:hover img { transform: scale(1.05); }
.logo .name { display: none; }
.nav-capsule { display: none; align-items: center; gap: 4px; background: rgba(241,245,249,.8); padding: 4px; border-radius: 999px; box-shadow: 0 0 0 1px rgba(226,232,240,.5); }
.nav-capsule a {
  display: inline-flex; align-items: center; gap: 6px; padding: 7px 16px; border-radius: 999px;
  font-size: 14px; color: var(--slate-500); text-decoration: none; transition: all .2s;
}
.nav-capsule a svg { width: 14px; height: 14px; }
.nav-capsule a:hover { color: var(--slate-800); background: rgba(255,255,255,.6); }
.nav-capsule a.active { background: #fff; color: var(--teal-700); box-shadow: 0 1px 3px rgba(15,23,42,.08); font-weight: 500; }
.nav-actions { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }
.nav-web {
  display: none; align-items: center; gap: 6px; padding: 8px 12px; border-radius: var(--radius-sm);
  font-size: 14px; color: var(--slate-600); text-decoration: none; transition: all .2s;
}
.nav-web:hover { color: var(--teal-700); background: rgba(240,253,250,.5); }
.nav-web svg { width: 16px; height: 16px; }
.btn-download { display: flex; align-items: center; gap: 6px; padding: 9px 12px; border-radius: var(--radius-sm); background: linear-gradient(135deg, var(--teal-600), var(--teal-700)); color: #fff; font-size: 14px; font-weight: 500; text-decoration: none; box-shadow: 0 4px 10px rgba(13,148,136,.2); transition: all .2s; }
.btn-download:hover { filter: brightness(1.08); box-shadow: 0 6px 14px rgba(13,148,136,.3); }
.btn-download svg { width: 16px; height: 16px; }
.btn-download .txt { display: none; }
.menu-toggle { display: inline-flex; align-items: center; justify-content: center; width: 40px; height: 40px; border: none; background: transparent; border-radius: var(--radius-sm); color: var(--slate-600); cursor: pointer; }
.menu-toggle:hover { background: var(--slate-100); }
.menu-toggle svg { width: 20px; height: 20px; }
.mobile-menu { display: none; border-top: 1px solid var(--slate-100); background: rgba(255,255,255,.95); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); }
.mobile-menu:not(.hidden) { display: block; } /* 移除 hidden 后显示（JS 通过 hidden 类控制展开/收起） */
.mobile-menu .inner { padding: 12px 0; }
.mobile-menu a { display: flex; align-items: center; gap: 12px; padding: 12px 16px; border-radius: var(--radius); font-size: 14px; color: var(--slate-600); text-decoration: none; }
.mobile-menu a:hover { background: var(--slate-50); }
.mobile-menu a.active { background: var(--teal-50); color: var(--teal-700); }
.mobile-menu a svg { width: 16px; height: 16px; }

/* ---------- 页脚 ---------- */
.site-footer { border-top: 1px solid var(--slate-200); background: #fff; }
.footer-grid { display: grid; gap: 32px; padding: 48px 0; grid-template-columns: 1fr; }
.footer-brand p { margin-top: 12px; max-width: 440px; font-size: 14px; color: var(--slate-500); }
.footer-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.footer-contact { margin-top: 16px; font-size: 14px; color: var(--slate-600); }
.footer-contact .row { display: flex; align-items: center; gap: 8px; margin-top: 6px; }
.footer-contact .lbl { font-weight: 600; }
.footer-contact a { color: var(--teal-700); text-decoration: none; }
.footer-contact a:hover { text-decoration: underline; }
.footer-col h3 { font-size: 14px; font-weight: 600; color: var(--slate-900); }
.footer-col ul { list-style: none; margin-top: 12px; }
.footer-col li { margin-top: 8px; }
.footer-col a { font-size: 14px; color: var(--slate-500); text-decoration: none; transition: color .2s; }
.footer-col a:hover { color: var(--teal-700); }
.footer-bottom { display: flex; flex-direction: column; align-items: center; justify-content: space-between; gap: 8px; border-top: 1px solid var(--slate-100); padding-top: 24px; margin-top: 40px; font-size: 14px; color: var(--slate-400); }

/* ---------- 首页 Hero ---------- */
.hero { position: relative; overflow: hidden; }
.hero .glow { position: absolute; inset: 0; pointer-events: none; background: linear-gradient(120deg, transparent 40%, rgba(13,148,136,.08) 100%); }
.hero-grid { display: grid; align-items: center; gap: 40px; padding: 64px 0; position: relative; grid-template-columns: 1fr; }
.hero-copy h1 { font-size: 38px; font-weight: 800; letter-spacing: -.02em; line-height: 1.15; color: var(--slate-900); }
.hero-copy h1 .br { display: block; }
.hero-copy .tagline { margin-top: 10px; font-size: 14px; font-weight: 500; color: var(--teal-700); }
.hero-copy .lead { margin-top: 16px; max-width: 560px; font-size: 17px; color: var(--slate-600); }
.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }
.hero-ver { margin-top: 14px; font-size: 12px; color: var(--slate-400); }
.hero-board { border: 1px solid var(--slate-200); background: #fff; border-radius: var(--radius-lg); padding: 24px; box-shadow: var(--shadow-lg); }
.board-bar { display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--slate-100); padding-bottom: 12px; }
.board-dots { display: flex; align-items: center; gap: 6px; }
.board-dots i { width: 12px; height: 12px; border-radius: 999px; }
.board-dots i.r { background: var(--red-400); }
.board-dots i.y { background: var(--yellow-400); }
.board-dots i.g { background: var(--green-500); }
.board-title { margin-left: 8px; font-size: 12px; color: var(--slate-400); }
.board-pill { border-radius: 999px; background: var(--teal-50); color: var(--teal-700); font-size: 10px; font-weight: 500; padding: 3px 10px; }
.board-rows { margin-top: 16px; }
.board-row { display: flex; align-items: center; gap: 12px; border-radius: var(--radius-sm); padding: 12px; }
.board-row.done { background: var(--teal-50); }
.board-row.pending { background: var(--slate-50); }
.board-row .ic { font-size: 20px; }
.board-row .body { flex: 1; }
.board-row .t { font-size: 14px; font-weight: 500; color: var(--slate-900); }
.board-row .s { font-size: 12px; color: var(--slate-500); }
.board-row .st { font-size: 12px; }
.board-row .st.ok { color: var(--teal-700); }
.board-row .st.run { color: var(--amber-600); }

/* ---------- 首页通用区块 ---------- */
.feature-grid { display: grid; gap: 24px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.feature-card { background: #fff; border: 1px solid var(--slate-200); border-radius: var(--radius); padding: 24px; text-align: center; }
.feature-card .ic { font-size: 30px; }
.feature-card h3 { margin-top: 8px; font-size: 16px; font-weight: 600; color: var(--slate-900); }
.feature-card p { margin-top: 8px; font-size: 14px; color: var(--slate-600); }
.step-card { background: #fff; border: 1px solid var(--slate-200); border-radius: var(--radius); padding: 24px; }
.step-card .top { display: flex; align-items: center; justify-content: space-between; }
.step-card .num { font-size: 24px; font-weight: 700; color: rgba(13,148,136,.4); }
.step-card .ic { font-size: 24px; }
.step-card h3 { margin-top: 8px; font-size: 16px; font-weight: 600; color: var(--slate-900); }
.step-card p { margin-top: 8px; font-size: 14px; color: var(--slate-600); }
.step-card .role { margin-top: 8px; font-size: 12px; color: var(--slate-400); }
.center-quote { max-width: 720px; margin: 0 auto; text-align: center; }
.center-quote h2 { font-size: 30px; font-weight: 700; letter-spacing: -.02em; }
.center-quote .q { margin-top: 24px; font-size: 17px; line-height: 1.8; color: var(--slate-600); }
.center-quote .q strong { color: var(--teal-800); font-weight: 500; }
.center-quote .box { margin-top: 24px; border: 1px solid var(--teal-200); background: #fff; border-radius: var(--radius); padding: 20px; text-align: left; }
.center-quote .box .bt { font-size: 14px; font-weight: 600; color: var(--teal-800); }
.center-quote .box p { margin-top: 8px; font-size: 14px; color: var(--slate-600); }
.center-quote .box .dim { color: var(--slate-500); }
.video-frame { border-radius: var(--radius-lg); border: 1px solid var(--slate-200); box-shadow: var(--shadow-lg); background: #000; overflow: hidden; }
.video-frame iframe { width: 100%; aspect-ratio: 16 / 9; border: 0; display: block; }
.video-note { margin-top: 12px; text-align: center; font-size: 14px; color: var(--slate-500); }
.video-note a { color: var(--teal-700); font-weight: 500; text-decoration: none; }
.video-note a:hover { text-decoration: underline; }
.dark-quote { max-width: 720px; margin: 0 auto; text-align: center; }
.dark-quote h2 { font-size: 30px; font-weight: 700; letter-spacing: -.02em; }
.dark-quote p { margin-top: 20px; font-size: 17px; line-height: 1.8; color: var(--slate-300); }
.dark-quote .hl { color: var(--teal-300); font-weight: 500; }
.dark-quote .soft { color: var(--slate-200); }
.dark-quote .tiny { font-size: 14px; color: var(--slate-400); }
.dark-quote .cta { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; margin-top: 32px; }
.promo-strip { max-width: 880px; margin: 0 auto; display: flex; flex-direction: column; align-items: center; justify-content: space-between; gap: 16px; border: 1px solid var(--teal-200); background: linear-gradient(to right, var(--teal-50), var(--cyan-50, #ecfeff)); border-radius: var(--radius-lg); padding: 24px; }
.promo-strip .t { font-size: 18px; font-weight: 700; color: var(--slate-900); }
.promo-strip .s { margin-top: 4px; font-size: 14px; color: var(--slate-600); }

/* ---------- 定价 ---------- */
.plans-grid { display: grid; gap: 24px; max-width: 800px; margin: 0 auto; grid-template-columns: 1fr; }
.plan-card { background: #fff; border-radius: var(--radius-lg); padding: 32px; position: relative; }
.plan-card.default { border: 1px solid var(--slate-200); }
.plan-card.featured { border: 2px solid var(--teal-600); box-shadow: var(--shadow-lg); }
.plan-badge { position: absolute; top: -12px; left: 50%; transform: translateX(-50%); background: var(--teal-600); color: #fff; font-size: 12px; font-weight: 500; padding: 4px 12px; border-radius: 999px; }
.plan-name { font-size: 20px; font-weight: 700; color: var(--slate-900); }
.plan-desc { margin-top: 4px; font-size: 14px; color: var(--slate-500); }
.plan-free-price { margin-top: 16px; font-size: 36px; font-weight: 700; color: var(--slate-900); }
.plan-free-price span { font-size: 15px; font-weight: 400; color: var(--slate-500); }
.plan-price { margin-top: 16px; }
.plan-price-main { display: flex; align-items: baseline; gap: 8px; }
.plan-price-main .big { font-size: 36px; font-weight: 700; color: var(--slate-900); }
.plan-price-main .unit { color: var(--slate-500); }
.plan-price-main .tag { background: var(--green-100); color: var(--green-700); font-size: 12px; padding: 2px 8px; border-radius: 999px; }
.plan-periods { display: flex; gap: 12px; margin-top: 12px; }
.plan-period { flex: 1; border: 1px solid var(--slate-200); border-radius: var(--radius-sm); padding: 8px; text-align: center; }
.plan-period .k { font-size: 12px; color: var(--slate-500); }
.plan-period .v { font-weight: 700; color: var(--slate-900); }
.plan-period .d { font-size: 10px; }
.plan-period.featured { border: 2px solid var(--teal-500); background: var(--teal-50); position: relative; }
.plan-period.featured .k { color: var(--teal-700); }
.plan-period.featured .v { color: var(--teal-700); }
.plan-period.featured .d { color: var(--teal-600); }
.plan-period .tag-abs { position: absolute; top: -8px; left: 50%; transform: translateX(-50%); background: var(--teal-600); color: #fff; font-size: 10px; padding: 1px 6px; border-radius: 999px; white-space: nowrap; }
.plan-features { list-style: none; margin-top: 24px; }
.plan-features li { display: flex; gap: 8px; font-size: 14px; color: var(--slate-700); padding: 6px 0; }
.plan-features .ck { color: var(--teal-700); }
.plan-cta { display: block; text-align: center; margin-top: 24px; width: 100%; }

/* ---------- 对比 Tab（纯静态，无 JS 时默认展示第一个面板） ---------- */
.cmp-tabs { display: flex; gap: 6px; margin-top: 36px; background: var(--slate-100); padding: 6px; border-radius: 999px; overflow-x: auto; scrollbar-width: none; -webkit-overflow-scrolling: touch; }
.cmp-tabs::-webkit-scrollbar { display: none; }
.cmp-tab { flex: 1 0 auto; min-width: max-content; padding: 10px 22px; border: none; background: transparent; border-radius: 999px; font-size: 14px; font-weight: 600; color: var(--slate-600); cursor: pointer; transition: background .2s, color .2s; white-space: nowrap; font-family: inherit; }
.cmp-tab:hover { color: var(--slate-900); }
.cmp-tab[aria-selected="true"] { background: #fff; color: var(--teal-700); box-shadow: 0 1px 4px rgba(15,23,42,.08); }
.cmp-panel { display: none; }
.cmp-panel.active { display: block; }
.cmp-takeaway { margin-top: 24px; padding: 16px 20px; border-radius: var(--radius); background: linear-gradient(135deg, var(--teal-50), #ecfeff); border: 1px solid var(--teal-100); font-size: 15px; color: var(--slate-700); display: flex; align-items: flex-start; gap: 10px; }
.cmp-takeaway .em { color: var(--teal-800); font-weight: 700; }
.cmp-wrap { margin-top: 16px; border-radius: var(--radius); border: 1px solid var(--slate-200); overflow: hidden; }
.cmp-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.cmp-table { border-collapse: collapse; width: 100%; min-width: 860px; font-size: 14px; }
.cmp-table th, .cmp-table td { padding: 12px 14px; text-align: left; vertical-align: top; border-bottom: 1px solid var(--slate-100); }
.cmp-table thead th { background: var(--slate-50); font-size: 13px; font-weight: 700; color: var(--slate-700); }
.cmp-table thead th .cat { display: block; font-size: 11px; font-weight: 500; color: var(--slate-400); margin-top: 2px; }
.cmp-table tbody tr:last-child td { border-bottom: none; }
.cmp-table td.dim { font-weight: 600; color: var(--slate-700); white-space: nowrap; background: var(--slate-50); position: sticky; left: 0; }
.cmp-table .col-us { background: var(--teal-50) !important; }
.cmp-table th.col-us { background: var(--teal-700) !important; color: #fff; }
.cmp-table th.col-us .cat { color: var(--teal-100); }
.us-tag { display: inline-block; font-size: 10px; background: #fff; color: var(--teal-700); padding: 1px 8px; border-radius: 999px; margin-left: 4px; vertical-align: 1px; font-weight: 700; }
.cmp-cell { display: flex; align-items: center; gap: 6px; }
.yes { color: var(--green-500); font-weight: 700; }
.no { color: var(--slate-400); }
.part { color: var(--amber-500); font-weight: 700; }
.cmp-note { display: block; color: var(--slate-500); font-size: 12px; margin-top: 1px; font-weight: 400; }
.strong { color: var(--teal-800); font-weight: 700; }
.pipeline-card { margin-top: 28px; border-radius: var(--radius); padding: 28px 24px; background: linear-gradient(135deg, var(--teal-900), var(--teal-700)); color: #fff; position: relative; overflow: hidden; }
.pipeline-card::after { content: "7×24 无人值守"; position: absolute; right: -18px; top: 22px; transform: rotate(12deg); background: rgba(255,255,255,.14); padding: 4px 26px; font-size: 12px; font-weight: 700; letter-spacing: .1em; border-radius: 6px; }
.pipeline-card h3 { font-size: 20px; font-weight: 800; }
.pipeline-card .pd { margin-top: 4px; font-size: 13px; color: rgba(255,255,255,.85); max-width: 640px; }
.pipeline-flow { display: flex; flex-wrap: wrap; align-items: stretch; gap: 8px; margin-top: 20px; }
.p-step { flex: 1 1 130px; min-width: 120px; background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.25); border-radius: 10px; padding: 12px 10px; text-align: center; }
.p-step .icon { font-size: 24px; }
.p-step .name { font-size: 14px; font-weight: 700; margin-top: 4px; }
.p-step .desc { font-size: 11px; color: rgba(255,255,255,.8); margin-top: 2px; }
.p-arrow { align-self: center; font-size: 16px; color: rgba(255,255,255,.7); flex: 0 0 auto; }
.p-loop { margin-top: 16px; font-size: 12px; color: rgba(255,255,255,.85); text-align: center; border-top: 1px dashed rgba(255,255,255,.25); padding-top: 12px; }
.footnote { margin-top: 28px; font-size: 12px; color: var(--slate-400); text-align: center; line-height: 1.8; }

/* ---------- 子页面通用 ---------- */
.page-hero { text-align: center; padding: 56px 0 8px; }
.page-hero h1 { font-size: 36px; font-weight: 800; letter-spacing: -.02em; }
.page-hero p { margin-top: 12px; font-size: 17px; color: var(--slate-600); }
.page-body { padding: 48px 0 72px; }
.stack { display: flex; flex-direction: column; gap: 16px; }
.grid2 { display: grid; gap: 16px; grid-template-columns: 1fr; }
.grid3 { display: grid; gap: 16px; grid-template-columns: 1fr; }
.grid4 { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); }

/* 下载页 */
.dl-cards { display: grid; gap: 16px; grid-template-columns: 1fr; max-width: 880px; margin: 0 auto; }
.dl-card { border-radius: var(--radius-lg); padding: 20px 24px; }
.dl-card.primary { border: 2px solid var(--teal-700); background: var(--teal-700); color: #fff; }
.dl-card.primary a { color: #fff; }
.dl-card.plain { border: 1px solid var(--slate-200); background: #fff; color: var(--slate-900); }
.dl-card .ic { width: 32px; height: 32px; }
.dl-card h3 { font-size: 18px; font-weight: 700; margin-top: 8px; }
.dl-card .os { font-size: 12px; opacity: .75; }
.dl-card .go { margin-top: 8px; font-size: 14px; font-weight: 500; transition: transform .2s; display: inline-block; }
.dl-card:hover .go { transform: translateX(4px); }
.dl-card.disabled { border: 1px solid var(--slate-200); background: var(--slate-50); color: var(--slate-400); cursor: default; }
.update-note { max-width: 800px; margin: 16px auto 0; display: flex; align-items: center; justify-content: space-between; gap: 12px; border: 1px solid var(--teal-100); background: var(--teal-50); border-radius: var(--radius); padding: 16px 20px; }
.update-note .t { font-weight: 700; color: var(--teal-800); }
.update-note .s { font-size: 12px; color: var(--teal-600); }
.alert-box { border: 1px solid #fde68a; background: #fffbeb; border-radius: var(--radius-lg); padding: 24px; max-width: 880px; margin: 0 auto; }
.alert-box h2 { font-size: 18px; font-weight: 700; color: var(--slate-900); }
.alert-box p { margin-top: 8px; font-size: 14px; color: var(--slate-600); }
.alert-box .hl { font-weight: 500; color: var(--slate-800); }
.alert-grid { display: grid; gap: 16px; grid-template-columns: 1fr; margin-top: 16px; }
.alert-grid .os { border: 1px solid var(--slate-200); background: #fff; border-radius: var(--radius); padding: 16px; }
.alert-grid .os .t { font-weight: 700; color: var(--slate-800); }
.alert-grid .os ol { margin: 8px 0 0 20px; font-size: 14px; color: var(--slate-600); }
.req-box { border: 1px solid var(--slate-200); background: #fff; border-radius: var(--radius-lg); padding: 24px; max-width: 880px; margin: 0 auto; }
.req-box h2 { font-size: 18px; font-weight: 700; }
.req-grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); margin-top: 16px; font-size: 14px; }
.req-grid .t { font-weight: 500; color: var(--slate-700); }
.req-grid p { color: var(--slate-500); margin-top: 2px; }
.req-links { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; border-top: 1px solid var(--slate-100); padding-top: 16px; margin-top: 24px; font-size: 14px; color: var(--slate-600); }
.req-links a { color: var(--teal-700); font-weight: 500; text-decoration: none; }
.req-links a:hover { text-decoration: underline; }
.dl-cta { text-align: center; max-width: 800px; margin: 0 auto; padding-bottom: 48px; }
.dl-cta h2 { font-size: 24px; font-weight: 700; }
.dl-cta p { margin-top: 8px; font-size: 14px; color: var(--slate-500); }
.dl-cta .btns { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; margin-top: 24px; }

/* 订阅页 */
.plan-compare { display: grid; gap: 24px; grid-template-columns: 1fr; }
.plan-card.free { border: 2px solid var(--slate-200); }
.price-note { margin-top: 40px; background: var(--slate-50); border-radius: var(--radius); padding: 24px; }
.price-note h3 { font-size: 18px; font-weight: 600; margin-bottom: 12px; }
.price-note-grid { display: grid; gap: 16px; grid-template-columns: 1fr; font-size: 14px; color: var(--slate-600); }
.price-note-item { display: flex; align-items: flex-start; gap: 8px; }
.price-note-item .t { font-weight: 500; color: var(--slate-800); }
.price-note-item p { margin-top: 2px; }
.price-note .ps { margin-top: 16px; font-size: 12px; color: var(--slate-500); }

/* FAQ 页 */
.faq-search { position: relative; max-width: 560px; margin: 32px auto 0; }
.faq-search input { width: 100%; border: 1px solid var(--slate-300); background: #fff; border-radius: var(--radius); padding: 12px 40px; font-size: 14px; outline: none; font-family: inherit; transition: border-color .2s, box-shadow .2s; }
.faq-search input:focus { border-color: var(--teal-600); box-shadow: 0 0 0 3px var(--teal-100); }
.faq-search .mag { position: absolute; left: 14px; top: 50%; transform: translateY(-50%); font-size: 15px; }
.faq-search .clear { position: absolute; right: 10px; top: 50%; transform: translateY(-50%); border: none; background: transparent; color: var(--slate-400); cursor: pointer; font-size: 15px; }
.faq-search .clear:hover { color: var(--slate-600); }
.faq-count { margin-top: 8px; font-size: 12px; color: var(--slate-500); text-align: center; }
.faq-list { max-width: 720px; margin: 40px auto 0; }
.faq-group h2 { font-size: 20px; font-weight: 700; margin-bottom: 16px; color: var(--slate-900); }
.faq-group + .faq-group { margin-top: 40px; }
.faq-item { border: 1px solid var(--slate-200); background: #fff; border-radius: var(--radius); padding: 20px; margin-top: 12px; transition: border-color .2s, box-shadow .2s; }
.faq-item[open] { border-color: var(--teal-300); box-shadow: 0 2px 8px rgba(15,23,42,.05); }
.faq-item summary { list-style: none; display: flex; align-items: center; justify-content: space-between; gap: 16px; font-size: 14px; font-weight: 500; color: var(--slate-900); cursor: pointer; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary .plus { color: var(--teal-700); font-size: 18px; flex-shrink: 0; transition: transform .2s; }
.faq-item[open] summary .plus { transform: rotate(45deg); }
.faq-item .ans { margin-top: 12px; font-size: 14px; line-height: 1.7; color: var(--slate-600); }
.faq-empty { max-width: 720px; margin: 40px auto 0; border: 1px solid var(--slate-200); background: #fff; border-radius: var(--radius); padding: 48px; text-align: center; }
.faq-empty .ic { font-size: 36px; }
.faq-empty h3 { margin-top: 16px; font-size: 18px; font-weight: 600; }
.faq-empty p { margin-top: 8px; font-size: 14px; color: var(--slate-500); }
.faq-empty .btn { margin-top: 16px; }
.faq-cta { max-width: 720px; margin: 64px auto 0; border: 1px solid rgba(15,118,110,.1); background: linear-gradient(to right, var(--teal-50), var(--cyan-50, #ecfeff)); border-radius: var(--radius-lg); padding: 32px; text-align: center; }
.faq-cta h3 { font-size: 20px; font-weight: 700; }
.faq-cta p { margin-top: 8px; font-size: 14px; color: var(--slate-600); }
.faq-cta .btns { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; margin-top: 16px; }

/* 联系页 */
.contact-grid { display: grid; gap: 16px; grid-template-columns: 1fr; max-width: 880px; margin: 0 auto; }
.contact-card { border: 1px solid var(--slate-200); background: #fff; border-radius: var(--radius); padding: 24px; transition: border-color .2s; }
.contact-card:hover { border-color: var(--teal-300); }
.contact-card .top { display: flex; align-items: flex-start; gap: 16px; }
.contact-card .ic { display: flex; align-items: center; justify-content: center; width: 48px; height: 48px; border-radius: var(--radius); background: var(--teal-50); font-size: 24px; flex-shrink: 0; }
.contact-card h3 { font-size: 18px; font-weight: 600; color: var(--slate-900); }
.contact-card .d { margin-top: 4px; font-size: 14px; color: var(--slate-600); }
.contact-card .v { margin-top: 12px; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 14px; font-weight: 500; color: var(--teal-700); word-break: break-all; }
.contact-card .n { margin-top: 4px; font-size: 12px; color: var(--slate-400); }
.form-card { max-width: 880px; margin: 0 auto; border: 1px solid var(--slate-200); background: #fff; border-radius: var(--radius-lg); padding: 32px; }
.form-card .hd { text-align: center; margin-bottom: 24px; }
.form-card .hd h2 { font-size: 24px; font-weight: 700; }
.form-card .hd p { margin-top: 8px; font-size: 14px; color: var(--slate-600); }
.form-field { margin-top: 20px; }
.form-field label { display: block; font-size: 14px; font-weight: 500; color: var(--slate-700); margin-bottom: 8px; }
.form-field .req { color: var(--red-400, #f87171); }
.form-field .opt { color: var(--slate-400); font-weight: 400; }
.form-field input, .form-field textarea { width: 100%; border: 1px solid var(--slate-300); border-radius: var(--radius-sm); padding: 10px 12px; font-size: 14px; outline: none; font-family: inherit; background: #fff; transition: border-color .2s, box-shadow .2s; }
.form-field input:focus, .form-field textarea:focus { border-color: var(--teal-600); box-shadow: 0 0 0 3px var(--teal-100); }
.type-grid { display: grid; gap: 8px; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); }
.type-btn { border: 1px solid var(--slate-200); background: #fff; color: var(--slate-600); border-radius: var(--radius-sm); padding: 12px; text-align: center; cursor: pointer; transition: all .2s; font-family: inherit; }
.type-btn:hover { border-color: var(--teal-300); }
.type-btn .ic { font-size: 20px; }
.type-btn .lb { margin-top: 4px; font-size: 12px; font-weight: 500; }
.type-btn.active { border-color: var(--teal-600); background: var(--teal-50); color: var(--teal-700); }
.form-error { display: none; margin-top: 16px; text-align: center; font-size: 14px; color: var(--red-400, #f87171); }
.form-success { display: none; padding: 48px 0; text-align: center; }
.form-success .circle { display: flex; align-items: center; justify-content: center; width: 80px; height: 80px; border-radius: 999px; background: var(--teal-100); margin: 0 auto; font-size: 32px; }
.form-success h3 { margin-top: 24px; font-size: 20px; font-weight: 700; }
.form-success p { margin-top: 8px; font-size: 14px; color: var(--slate-600); }
.form-success .btn { margin-top: 24px; }
.wechat-box { max-width: 880px; margin: 48px auto 0; border: 1px solid rgba(15,118,110,.1); background: linear-gradient(to right, var(--teal-50), var(--cyan-50, #ecfeff)); border-radius: var(--radius-lg); padding: 32px; }
.wechat-box .inner { display: flex; flex-direction: column; align-items: center; gap: 24px; }
.wechat-box h2 { font-size: 20px; font-weight: 700; }
.wechat-box .d { margin-top: 8px; font-size: 14px; color: var(--slate-600); max-width: 440px; }
.wechat-box ul { list-style: none; margin-top: 16px; font-size: 14px; color: var(--slate-600); }
.wechat-box li { display: flex; align-items: center; gap: 8px; margin-top: 6px; }
.wechat-box li .ck { color: var(--teal-600); }
.wechat-box img { border: 1px solid var(--teal-200); border-radius: var(--radius); box-shadow: var(--shadow-card); max-width: 280px; }
.wechat-box .cap { margin-top: 8px; font-size: 12px; color: var(--slate-500); }
.quick-links { max-width: 880px; margin: 48px auto 0; }
.quick-links h2 { font-size: 20px; font-weight: 700; margin-bottom: 16px; }
.quick-links .grid { display: grid; gap: 12px; grid-template-columns: 1fr; }
.quick-links a { display: flex; align-items: center; justify-content: space-between; border: 1px solid var(--slate-200); background: #fff; border-radius: var(--radius-sm); padding: 12px 16px; font-size: 14px; color: var(--slate-700); text-decoration: none; transition: border-color .2s, color .2s; }
.quick-links a:hover { border-color: var(--teal-300); color: var(--teal-700); }
.quick-links a .ar { color: var(--teal-600); }
.resp-box { max-width: 880px; margin: 48px auto 0; border: 1px solid var(--slate-200); background: var(--slate-50); border-radius: var(--radius); padding: 24px; }
.resp-box h3 { font-size: 16px; font-weight: 600; }
.resp-grid { display: grid; gap: 12px; margin-top: 12px; font-size: 14px; color: var(--slate-600); grid-template-columns: 1fr; }
.resp-grid .t { font-weight: 500; color: var(--slate-900); }
.resp-box .ps { margin-top: 12px; font-size: 12px; color: var(--slate-400); }

/* 推广页 */
.promo-hero { position: relative; overflow: hidden; text-align: center; padding: 64px 0 24px; }
.promo-hero .glow { position: absolute; inset: 0; pointer-events: none; background: linear-gradient(120deg, transparent 40%, rgba(13,148,136,.08) 100%); }
.promo-hero h1 { font-size: 40px; font-weight: 800; letter-spacing: -.02em; line-height: 1.2; position: relative; }
.promo-hero p { max-width: 640px; margin: 16px auto 0; font-size: 17px; color: var(--slate-600); position: relative; }
.promo-hero .hl { color: var(--teal-800); font-weight: 500; }
.promo-hero .btns { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; margin-top: 32px; position: relative; }
.promo-col { text-align: center; }
.promo-col h2 { font-size: 30px; font-weight: 700; letter-spacing: -.02em; }
.promo-col .sub { margin-top: 8px; color: var(--slate-600); }
.promo-cards { display: grid; gap: 24px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.promo-who { max-width: 640px; margin: 40px auto 0; border: 1px solid var(--teal-200); background: linear-gradient(135deg, var(--teal-50), var(--cyan-50, #ecfeff)); border-radius: var(--radius-lg); padding: 24px; text-align: center; }
.promo-who .t { font-size: 14px; font-weight: 600; color: var(--teal-800); }
.promo-who p { margin-top: 8px; font-size: 14px; line-height: 1.8; color: var(--slate-600); }
.promo-nums { display: grid; gap: 24px; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); text-align: center; margin-bottom: 24px; }
.promo-nums .v { font-size: 32px; font-weight: 700; color: var(--teal-700); }
.promo-nums .k { margin-top: 4px; font-size: 14px; color: var(--slate-600); }
.promo-rules { display: grid; gap: 12px; grid-template-columns: 1fr; margin-top: 24px; font-size: 14px; color: var(--slate-700); }
.promo-rules div { display: flex; align-items: flex-start; gap: 8px; }
.promo-disclaimer { margin-top: 16px; text-align: center; font-size: 12px; color: var(--slate-400); }

/* 帮助页 */
.help-nav { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); max-width: 880px; margin: 0 auto; }
.help-nav a { border: 1px solid var(--slate-200); background: #fff; border-radius: var(--radius); padding: 16px; text-align: center; text-decoration: none; transition: border-color .2s, background .2s; }
.help-nav a:hover { border-color: var(--teal-300); background: var(--teal-50); }
.help-nav .ic { font-size: 24px; }
.help-nav .t { margin-top: 8px; font-size: 14px; font-weight: 600; color: var(--slate-900); }
.help-nav .d { margin-top: 4px; font-size: 12px; color: var(--slate-500); }
.help-why { max-width: 880px; margin: 0 auto; border: 1px solid rgba(15,118,110,.1); background: linear-gradient(to right, var(--teal-50), var(--cyan-50, #ecfeff)); border-radius: var(--radius-lg); padding: 32px; }
.help-why h2 { font-size: 20px; font-weight: 700; }
.help-why > p { margin-top: 8px; font-size: 14px; color: var(--slate-600); }
.help-features { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); margin-top: 24px; }
.help-feature { background: #fff; border-radius: var(--radius); padding: 16px; }
.help-feature .t { display: flex; align-items: center; gap: 8px; font-size: 14px; font-weight: 600; color: var(--slate-900); }
.help-feature p { margin-top: 8px; font-size: 12px; color: var(--slate-500); }
.help-sec { max-width: 880px; margin: 0 auto; }
.help-sec + .help-sec { margin-top: 64px; }
.help-sec .sec-head { display: flex; align-items: center; gap: 12px; margin-bottom: 24px; }
.help-sec .sec-ic { display: flex; align-items: center; justify-content: center; width: 40px; height: 40px; border-radius: 999px; background: var(--teal-700); font-size: 18px; color: #fff; }
.help-sec .sec-head h2 { font-size: 24px; font-weight: 700; }
.help-sec .sec-head p { font-size: 14px; color: var(--slate-500); }
.help-guide { border: 1px solid var(--slate-200); background: #fff; border-radius: var(--radius); padding: 20px; }
.help-guide .num { display: flex; align-items: center; justify-content: center; width: 32px; height: 32px; border-radius: 999px; background: var(--teal-100); color: var(--teal-700); font-size: 14px; font-weight: 700; }
.help-guide .t { display: flex; align-items: center; gap: 8px; margin-top: 8px; }
.help-guide .t .ic { font-size: 20px; }
.help-guide h3 { font-size: 18px; font-weight: 600; }
.help-guide p { margin-top: 12px; font-size: 14px; color: var(--slate-600); }
.help-guide a.more { display: inline-block; margin-top: 12px; font-size: 14px; font-weight: 500; color: var(--teal-700); text-decoration: none; }
.help-guide a.more:hover { text-decoration: underline; }
.help-card { border: 1px solid var(--slate-200); background: #fff; border-radius: var(--radius); padding: 20px; transition: border-color .2s; }
.help-card:hover { border-color: var(--teal-300); }
.help-card .ic { font-size: 30px; }
.help-card h3 { margin-top: 12px; font-size: 16px; font-weight: 600; }
.help-card p { margin-top: 4px; font-size: 12px; color: var(--slate-500); }
.help-card ul { list-style: none; margin-top: 12px; }
.help-card li { display: flex; align-items: center; gap: 6px; font-size: 12px; color: var(--slate-600); padding: 2px 0; }
.help-card li .ck { color: var(--teal-600); }
.help-video { max-width: 880px; margin: 0 auto; border: 1px solid var(--slate-200); background: linear-gradient(to right, var(--slate-900), var(--slate-800)); border-radius: var(--radius-lg); padding: 32px; color: #fff; }
.help-video h2 { display: flex; align-items: center; gap: 12px; font-size: 20px; font-weight: 700; }
.help-video p { margin-top: 8px; font-size: 14px; color: var(--slate-300); }
.help-video .btns { display: flex; gap: 12px; margin-top: 16px; }
.help-video .btns a { border-radius: var(--radius-sm); padding: 10px 16px; font-size: 14px; text-decoration: none; transition: background .2s; }
.help-video .btns .ghost { background: rgba(255,255,255,.1); color: #fff; }
.help-video .btns .ghost:hover { background: rgba(255,255,255,.2); }
.help-video .btns .teal { background: var(--teal-600); color: #fff; }
.help-video .btns .teal:hover { background: var(--teal-700); }
.help-bottom { display: grid; gap: 16px; grid-template-columns: 1fr; max-width: 880px; margin: 0 auto; }
.help-bottom a { border: 1px solid var(--slate-200); background: #fff; border-radius: var(--radius); padding: 20px; text-align: center; text-decoration: none; transition: border-color .2s; }
.help-bottom a:hover { border-color: var(--teal-300); }
.help-bottom .ic { font-size: 24px; }
.help-bottom h3 { margin-top: 8px; font-weight: 500; color: var(--slate-900); }
.help-bottom p { margin-top: 4px; font-size: 12px; color: var(--slate-500); }

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .logo .name { display: block; }
  .btn-download .txt { display: inline; }
  .grid2 { grid-template-columns: repeat(2, 1fr); }
  .grid3 { grid-template-columns: repeat(3, 1fr); }
  .dl-cards { grid-template-columns: repeat(3, 1fr); }
  .alert-grid { grid-template-columns: repeat(2, 1fr); }
  .plan-compare { grid-template-columns: repeat(2, 1fr); }
  .plans-grid { grid-template-columns: repeat(2, 1fr); }
  .price-note-grid { grid-template-columns: repeat(3, 1fr); }
  .contact-grid { grid-template-columns: repeat(2, 1fr); }
  .quick-links .grid { grid-template-columns: repeat(2, 1fr); }
  .resp-grid { grid-template-columns: repeat(3, 1fr); }
  .promo-rules { grid-template-columns: repeat(2, 1fr); }
  .help-bottom { grid-template-columns: repeat(3, 1fr); }
}
@media (min-width: 768px) {
  .nav-capsule { display: flex; }
  .nav-web { display: flex; }
  .menu-toggle { display: none; }
  .hero-grid { grid-template-columns: 1fr 1fr; }
  .promo-strip { flex-direction: row; }
  .footer-grid { grid-template-columns: 1.4fr 1fr 1fr; }
  .footer-bottom { flex-direction: row; }
  .wechat-box .inner { flex-direction: row; justify-content: space-between; }
}
@media (max-width: 640px) {
  .hero-copy h1 { font-size: 28px; }
  .page-hero h1, .promo-hero h1 { font-size: 28px; }
  .cmp-tab { padding: 9px 16px; font-size: 13px; }
  .pipeline-flow { gap: 6px; }
  .p-arrow { display: none; }
  .section-pad { padding: 48px 0; }
}

/* ---------- 子页面布局补全（promote / help / contact 实际使用的类） ---------- */

/* 推广页：两条路径 */
.promo-paths { display: grid; gap: 24px; grid-template-columns: 1fr; max-width: 880px; margin: 0 auto; }
.path-card { border: 1px solid var(--slate-200); background: #fff; border-radius: var(--radius-lg); padding: 28px; }
.path-card.featured { border: 2px solid var(--teal-600); box-shadow: var(--shadow-lg); }
.path-card .top { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.path-card .top .ic { font-size: 26px; }
.path-card .tag { font-size: 12px; font-weight: 600; letter-spacing: .06em; color: var(--teal-700); background: var(--teal-50); border: 1px solid var(--teal-100); padding: 3px 10px; border-radius: 999px; }
.path-card.featured .tag { background: var(--teal-600); color: #fff; border-color: var(--teal-600); }
.path-card h3 { font-size: 22px; font-weight: 700; color: var(--slate-900); }
.path-card .rate { margin-top: 10px; font-size: 34px; font-weight: 800; color: var(--teal-700); letter-spacing: -.02em; }
.path-card .rate span { font-size: 15px; font-weight: 500; color: var(--slate-500); }
.path-card .desc { margin-top: 12px; font-size: 14px; color: var(--slate-600); line-height: 1.75; }
.path-card ul { list-style: none; margin-top: 18px; border-top: 1px dashed var(--slate-200); padding-top: 16px; }
.path-card li { display: flex; align-items: flex-start; gap: 8px; font-size: 14px; color: var(--slate-700); padding: 4px 0; }
.path-card li .ck { color: var(--teal-600); font-weight: 700; flex-shrink: 0; }

/* 推广页：怎么玩 / 适合谁 */
.how-grid { display: grid; gap: 20px; grid-template-columns: 1fr; max-width: 880px; margin: 0 auto; }
.how-step { background: #fff; border: 1px solid var(--slate-200); border-radius: var(--radius); padding: 24px; }
.how-step .num { font-size: 28px; font-weight: 800; color: rgba(13,148,136,.35); }
.how-step h3 { margin-top: 10px; font-size: 18px; font-weight: 600; color: var(--slate-900); }
.how-step p { margin-top: 8px; font-size: 14px; color: var(--slate-600); }
.who-grid { display: grid; gap: 16px; grid-template-columns: 1fr; max-width: 880px; margin: 0 auto; }
.who-grid > div { background: #fff; border: 1px solid var(--slate-200); border-radius: var(--radius); padding: 20px; }
.who-grid h3 { font-size: 16px; font-weight: 600; color: var(--slate-900); }
.who-grid p { margin-top: 8px; font-size: 14px; color: var(--slate-600); }

/* 帮助页：快速上手 / 功能教程 */
.quickstart { max-width: 880px; margin: 0 auto; }
.quickstart h2 { font-size: 24px; font-weight: 700; margin-bottom: 8px; }
.qs-steps { margin-top: 16px; }
.qs-step-item { display: flex; align-items: flex-start; gap: 20px; padding: 20px 0; border-bottom: 1px dashed var(--slate-200); }
.qs-step-item:last-child { border-bottom: none; }
.qs-step-item .num { display: flex; align-items: center; justify-content: center; width: 40px; height: 40px; border-radius: 999px; background: var(--teal-100); color: var(--teal-700); font-size: 16px; font-weight: 700; flex-shrink: 0; }
.qs-step-item h3 { font-size: 17px; font-weight: 600; color: var(--slate-900); }
.qs-step-item p { margin-top: 4px; font-size: 14px; color: var(--slate-600); }
.help-grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.help-cta-row { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; }

/* 联系页：三张联系卡（a 标签需去下划线） */
.contact-cards { display: grid; gap: 16px; grid-template-columns: 1fr; max-width: 880px; margin: 0 auto; }
.contact-card { display: block; text-decoration: none; }
.contact-card .ic { display: flex; align-items: center; justify-content: center; width: 52px; height: 52px; border-radius: var(--radius); background: var(--teal-50); font-size: 26px; }
.contact-card h3 { margin-top: 14px; font-size: 18px; font-weight: 600; color: var(--slate-900); }
.contact-card p { margin-top: 4px; font-size: 14px; color: var(--slate-600); }
.contact-card .go { display: inline-block; margin-top: 16px; font-size: 14px; font-weight: 500; color: var(--teal-700); transition: transform .2s; }
.contact-card:hover .go { transform: translateX(4px); }

/* 联系页：反馈表单 */
.feedback-wrap { max-width: 880px; margin: 0 auto; padding: 48px 0 72px; }
.feedback-wrap h2 { font-size: 26px; font-weight: 700; text-align: center; }
.feedback-wrap .sub { margin-top: 8px; font-size: 14px; color: var(--slate-600); text-align: center; }
.feedback-form { margin-top: 32px; background: #fff; border: 1px solid var(--slate-200); border-radius: var(--radius-lg); padding: 32px; }
.feedback-form label { display: block; font-size: 14px; font-weight: 500; color: var(--slate-700); margin-bottom: 8px; }
.feedback-form label:not(:first-child) { margin-top: 20px; }
.feedback-form em { color: var(--red-400); font-style: normal; }
.feedback-form input, .feedback-form textarea { width: 100%; border: 1px solid var(--slate-300); border-radius: var(--radius-sm); padding: 10px 12px; font-size: 14px; outline: none; font-family: inherit; background: #fff; transition: border-color .2s, box-shadow .2s; }
.feedback-form input:focus, .feedback-form textarea:focus { border-color: var(--teal-600); box-shadow: 0 0 0 3px var(--teal-100); }
.type-btns { display: grid; gap: 8px; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); }
.fb-error { display: none; margin-top: 16px; text-align: center; font-size: 14px; color: var(--red-400); }
.feedback-success { text-align: center; padding: 40px 0; }
.feedback-success .ic { font-size: 40px; }
.feedback-success h3 { margin-top: 16px; font-size: 20px; font-weight: 700; }
.feedback-success p { margin-top: 8px; font-size: 14px; color: var(--slate-500); }
.feedback-success .btn { margin-top: 20px; }

/* 子页面补全：响应式列数 */
@media (min-width: 640px) {
  .promo-paths { grid-template-columns: 1fr 1fr; }
  .who-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-cards { grid-template-columns: repeat(3, 1fr); }
}
@media (min-width: 768px) {
  .how-grid { grid-template-columns: repeat(3, 1fr); }
  .who-grid { grid-template-columns: repeat(4, 1fr); }
}