/* ============================================================
   墨记 MoJi 官网 — 共享样式
   墨与纸：暖纸白 / 墨绿 / 琥珀
   ============================================================ */

/* ---------- 设计令牌 ---------- */
:root {
  --paper: #F6F3EC;
  --paper-2: #EFEAE0;
  --card: #FFFFFF;
  --ink: #1D2B26;
  --ink-2: #55635D;
  --ink-3: #7C8A84;
  --pine: #1E5B46;
  --pine-deep: #143D2F;
  --pine-soft: #E3EDE7;
  --amber: #D98E3F;
  --amber-soft: #F5E6D3;
  --line: rgba(29, 43, 38, 0.12);
  --line-strong: rgba(29, 43, 38, 0.22);
  --shadow: 0 12px 32px rgba(29, 43, 38, 0.10);
  --shadow-sm: 0 4px 14px rgba(29, 43, 38, 0.08);
  --radius: 14px;
  --radius-lg: 22px;
  --font-display: "Sora", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", -apple-system, BlinkMacSystemFont, sans-serif;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ---------- 字体 ---------- */
@font-face {
  font-family: "Sora";
  src: url("../fonts/sora-latin-400-normal.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Sora";
  src: url("../fonts/sora-latin-600-normal.woff2") format("woff2");
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Sora";
  src: url("../fonts/sora-latin-700-normal.woff2") format("woff2");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Sora";
  src: url("../fonts/sora-latin-800-normal.woff2") format("woff2");
  font-weight: 800;
  font-style: normal;
  font-display: swap;
}

/* ---------- 基础 ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; display: block; }
a { color: var(--pine); text-decoration: none; transition: color .2s var(--ease); }
a:hover { color: var(--pine-deep); }
p { margin: 0 0 1em; }
h1, h2, h3, h4 { font-family: var(--font-display); line-height: 1.25; margin: 0 0 .5em; font-weight: 700; letter-spacing: -0.01em; }
::selection { background: var(--pine); color: var(--paper); }
:focus-visible { outline: 2px solid var(--amber); outline-offset: 2px; border-radius: 4px; }

.container { width: min(1120px, 92vw); margin-inline: auto; }

/* 页面顶部公共条幅 */
.page-hero {
  padding: clamp(56px, 8vw, 96px) 0 clamp(40px, 6vw, 72px);
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, #FBF9F4 0%, var(--paper) 100%);
}
.page-hero .eyebrow { margin-bottom: 16px; }
.page-hero h1 { font-size: clamp(1.9rem, 4.2vw, 3rem); font-weight: 800; margin-bottom: 14px; }
.page-hero .lede { max-width: 620px; color: var(--ink-2); font-size: 1.06rem; margin: 0; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 22px; border-radius: 999px;
  font-family: var(--font-display); font-size: .95rem; font-weight: 600;
  border: 1px solid transparent; cursor: pointer; white-space: nowrap;
  transition: transform .18s var(--ease), box-shadow .18s var(--ease), background .18s var(--ease), color .18s var(--ease);
}
.btn svg { flex: 0 0 auto; }
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--pine); color: #F4F1E9; }
.btn-primary:hover { background: var(--pine-deep); color: #F4F1E9; box-shadow: var(--shadow-sm); transform: translateY(-1px); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line-strong); }
.btn-ghost:hover { border-color: var(--pine); color: var(--pine); }
.btn-amber { background: var(--amber); color: #2A1E0C; }
.btn-amber:hover { background: #C97E2C; color: #2A1E0C; box-shadow: var(--shadow-sm); transform: translateY(-1px); }
.btn-sm { padding: 8px 16px; font-size: .88rem; }

/* ---------- 眉标 / 小节标题 ---------- */
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-display); font-size: .8rem; font-weight: 600;
  letter-spacing: .14em; color: var(--pine); text-transform: uppercase;
}
.eyebrow::before { content: ""; width: 22px; height: 2px; background: var(--amber); border-radius: 2px; }
.section { padding: clamp(64px, 9vw, 108px) 0; }
.section-head { max-width: 640px; margin-bottom: clamp(32px, 5vw, 56px); }
.section-head h2 { font-size: clamp(1.55rem, 3.4vw, 2.3rem); font-weight: 800; margin: 12px 0 12px; }
.section-head p { color: var(--ink-2); margin: 0; }

/* ---------- 页头导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 60;
  background: rgba(246, 243, 236, 0.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color .25s ease, box-shadow .25s ease;
}
.site-header.scrolled { border-bottom-color: var(--line); box-shadow: 0 6px 20px rgba(29,43,38,.05); }
.nav-wrap { display: flex; align-items: center; gap: 24px; height: 68px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-family: var(--font-display); font-weight: 800; font-size: 1.18rem; color: var(--ink); }
.brand:hover { color: var(--ink); }
.brand img { width: 34px; height: 34px; border-radius: 9px; }
.main-nav { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.main-nav a {
  position: relative; padding: 8px 14px; border-radius: 999px;
  font-size: .95rem; color: var(--ink-2); font-weight: 500;
}
.main-nav a:hover { color: var(--pine); background: rgba(30, 91, 70, 0.07); }
.main-nav a.on { color: var(--pine); font-weight: 600; }
.main-nav a.on::after {
  content: ""; position: absolute; left: 50%; bottom: 2px; transform: translateX(-50%);
  width: 16px; height: 3px; border-radius: 2px; background: var(--amber);
}
.nav-cta { margin-left: 8px; }
.nav-toggle {
  display: none; margin-left: auto;
  width: 42px; height: 42px; border-radius: 10px;
  border: 1px solid var(--line); background: var(--card); cursor: pointer;
  align-items: center; justify-content: center;
}
.nav-toggle svg { width: 20px; height: 20px; stroke: var(--ink); }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--pine-deep); color: rgba(246,243,236,.78); margin-top: 0; }
.footer-grid {
  display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px;
  padding: clamp(48px, 7vw, 72px) 0 40px;
}
.footer-brand .brand { color: #F6F3EC; margin-bottom: 14px; }
.footer-brand .brand img { width: 32px; height: 32px; }
.footer-brand p { font-size: .92rem; color: rgba(246,243,236,.6); max-width: 300px; margin: 0; }
.footer-col h4 { font-size: .82rem; font-weight: 600; letter-spacing: .12em; color: #F6F3EC; margin-bottom: 16px; text-transform: uppercase; }
.footer-col a { display: block; padding: 5px 0; font-size: .93rem; color: rgba(246,243,236,.66); }
.footer-col a:hover { color: #F6F3EC; }
.footer-bottom {
  border-top: 1px solid rgba(246,243,236,.14);
  padding: 20px 0; font-size: .85rem; color: rgba(246,243,236,.5);
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
}

/* ---------- Hero（首页） ---------- */
.hero { position: relative; overflow: hidden; padding: clamp(56px, 7vw, 92px) 0 clamp(64px, 8vw, 100px); }
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: clamp(32px, 5vw, 72px); align-items: center; }
.hero h1 { font-size: clamp(2.3rem, 5.2vw, 3.7rem); font-weight: 800; line-height: 1.18; margin: 18px 0 20px; letter-spacing: -0.02em; }
.hero h1 .hl { color: var(--pine); }
.hero .sub { font-size: 1.08rem; color: var(--ink-2); max-width: 480px; margin-bottom: 30px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 26px; }
.hero-notes { font-size: .86rem; color: var(--ink-3); margin: 0; }
.hero-art { position: relative; }
.hero-art img { width: min(360px, 78%); margin-inline: auto; border-radius: 26px; box-shadow: var(--shadow); }
.hero-badge {
  position: absolute; top: 6%; left: 0;
  background: var(--card); border: 1px solid var(--line);
  border-radius: 12px; padding: 12px 16px; box-shadow: var(--shadow-sm);
  font-size: .82rem; color: var(--ink-2); line-height: 1.5;
}
.hero-badge b { display: block; font-family: var(--font-display); color: var(--ink); font-size: .92rem; }
.hero-dot {
  position: absolute; right: 4%; bottom: 10%;
  width: 14px; height: 14px; border-radius: 50%; background: var(--amber);
  box-shadow: 0 0 0 8px rgba(217,142,63,.16);
}

/* ---------- 通用卡片 ---------- */
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 26px; transition: transform .25s var(--ease), box-shadow .25s var(--ease); }
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.card .icon { width: 48px; height: 48px; border-radius: 13px; display: grid; place-items: center; background: var(--pine-soft); color: var(--pine); margin-bottom: 18px; }
.card .icon svg { width: 24px; height: 24px; }
.card h3 { font-size: 1.08rem; margin-bottom: 8px; }
.card p { font-size: .93rem; color: var(--ink-2); margin: 0; }

/* 首页功能预览：图卡 */
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.fig-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-lg); overflow: hidden; display: flex; flex-direction: column; }
.fig-card .fig { aspect-ratio: 4 / 3; overflow: hidden; }
.fig-card .fig img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s var(--ease); }
.fig-card:hover .fig img { transform: scale(1.045); }
.fig-card .body { padding: 22px 24px 26px; }
.fig-card h3 { font-size: 1.1rem; margin-bottom: 8px; }
.fig-card p { font-size: .93rem; color: var(--ink-2); margin: 0; }

/* ---------- 首页产品展示区 ---------- */
.showcase { background: var(--card); border-block: 1px solid var(--line); }
.showcase-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: clamp(32px, 5vw, 64px); align-items: center; }
.showcase-media { border: 1px solid var(--line); border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow); background: #fff; }
.showcase-media img { width: 100%; height: auto; }
.check-list { list-style: none; padding: 0; margin: 24px 0 0; }
.check-list li { display: flex; gap: 12px; align-items: baseline; padding: 9px 0; color: var(--ink-2); font-size: .97rem; }
.check-list svg { flex: 0 0 auto; width: 18px; height: 18px; transform: translateY(3px); color: var(--pine); }

/* ---------- 平台覆盖条 ---------- */
.platforms { border-top: 1px solid var(--line); }
.platform-strip { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; }
.platform-cell {
  display: flex; flex-direction: column; align-items: center; gap: 10px;
  padding: 22px 10px; border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--card); text-align: center; transition: border-color .2s, transform .2s var(--ease);
}
.platform-cell:hover { border-color: var(--pine); transform: translateY(-3px); }
.platform-cell svg { width: 30px; height: 30px; color: var(--pine); }
.platform-cell b { font-family: var(--font-display); font-size: .95rem; font-weight: 600; }
.platform-cell span { font-size: .8rem; color: var(--ink-3); }

/* ---------- CTA 横幅 ---------- */
.cta-band { background: var(--pine); color: #F4F1E9; border-radius: var(--radius-lg); padding: clamp(40px, 6vw, 64px); text-align: center; position: relative; overflow: hidden; }
.cta-band::after {
  content: ""; position: absolute; right: -60px; top: -60px; width: 240px; height: 240px;
  border-radius: 50%; background: radial-gradient(circle, rgba(217,142,63,.35), transparent 70%);
}
.cta-band h2 { color: #F4F1E9; font-size: clamp(1.5rem, 3.2vw, 2.1rem); font-weight: 800; margin-bottom: 12px; }
.cta-band p { color: rgba(244,241,233,.75); max-width: 520px; margin: 0 auto 26px; }
.cta-band .btn { position: relative; z-index: 1; }
.cta-band .btn-amber:hover { background: #C97E2C; }

/* ---------- 功能页：特性网格 ---------- */
.feat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.feat-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 28px; display: flex; gap: 18px; transition: transform .25s var(--ease), box-shadow .25s var(--ease), border-color .25s; }
.feat-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: rgba(30,91,70,.35); }
.feat-card .icon { flex: 0 0 auto; width: 46px; height: 46px; border-radius: 12px; display: grid; place-items: center; background: var(--pine-soft); color: var(--pine); }
.feat-card .icon svg { width: 22px; height: 22px; }
.feat-card h3 { font-size: 1.05rem; margin: 2px 0 8px; }
.feat-card p { font-size: .92rem; color: var(--ink-2); margin: 0; }

/* 流程时间轴 */
.process { background: var(--card); border-block: 1px solid var(--line); }
.process-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; position: relative; }
.process-grid::before {
  content: ""; position: absolute; top: 24px; left: 8%; right: 8%; height: 2px;
  background: linear-gradient(90deg, var(--pine), var(--amber));
}
.process-step { position: relative; text-align: center; padding: 0 16px; }
.process-step .dot { width: 48px; height: 48px; margin: 0 auto 16px; border-radius: 50%; background: var(--paper); border: 2px solid var(--pine); display: grid; place-items: center; color: var(--pine); position: relative; z-index: 1; }
.process-step .dot svg { width: 20px; height: 20px; }
.process-step:nth-child(4) .dot { border-color: var(--amber); color: var(--amber); }
.process-step h3 { font-size: 1rem; margin-bottom: 6px; }
.process-step p { font-size: .86rem; color: var(--ink-2); margin: 0; }

/* 安全横幅（功能页） */
.security-band { background: var(--pine-deep); color: rgba(246,243,236,.85); border-radius: var(--radius-lg); padding: clamp(32px, 5vw, 52px); display: grid; grid-template-columns: 1.2fr 1fr; gap: 32px; align-items: center; }
.security-band h2 { color: #F6F3EC; font-size: clamp(1.4rem, 2.8vw, 1.9rem); margin-bottom: 12px; }
.security-band p { color: rgba(246,243,236,.7); margin: 0; }
.security-points { list-style: none; margin: 0; padding: 0; }
.security-points li { display: flex; gap: 10px; align-items: flex-start; padding: 9px 0; font-size: .95rem; border-bottom: 1px solid rgba(246,243,236,.12); }
.security-points li:last-child { border-bottom: 0; }
.security-points svg { flex: 0 0 auto; width: 18px; height: 18px; transform: translateY(3px); color: var(--amber); }

/* ---------- 下载页 ---------- */
.dl-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.dl-card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: 28px; display: flex; flex-direction: column; gap: 6px;
}
.dl-card .dl-head { display: flex; align-items: center; gap: 14px; margin-bottom: 10px; }
.dl-card .dl-ico { width: 54px; height: 54px; border-radius: 14px; background: var(--pine-soft); display: grid; place-items: center; color: var(--pine); }
.dl-card .dl-ico svg { width: 28px; height: 28px; }
.dl-card h3 { font-size: 1.2rem; margin: 0; }
.dl-card .dl-ver { font-size: .86rem; color: var(--ink-3); }
.dl-card p { font-size: .92rem; color: var(--ink-2); margin: 6px 0 18px; flex: 1; }
.dl-meta { display: flex; gap: 18px; flex-wrap: wrap; font-size: .84rem; color: var(--ink-3); margin-bottom: 18px; }
.dl-meta b { color: var(--ink); font-weight: 600; font-family: var(--font-display); }

.table-scroll { overflow-x: auto; }
.spec-table { width: 100%; border-collapse: collapse; font-size: .94rem; background: var(--card); }
.spec-table th, .spec-table td { padding: 14px 18px; text-align: left; border-bottom: 1px solid var(--line); }
.spec-table th { font-family: var(--font-display); font-weight: 600; font-size: .85rem; letter-spacing: .06em; color: var(--ink-2); background: var(--paper-2); }
.spec-table th:first-child { border-radius: 12px 0 0 0; }
.spec-table th:last-child { border-radius: 0 12px 0 0; }
.spec-table tr:last-child td { border-bottom: 0; }
.spec-table td:first-child { font-weight: 600; color: var(--ink); white-space: nowrap; }
.spec-table .yes { color: var(--pine); font-weight: 600; }
.spec-table .no { color: var(--ink-3); }

.version-note { background: var(--pine-soft); border-left: 3px solid var(--pine); border-radius: 0 12px 12px 0; padding: 16px 20px; font-size: .92rem; color: var(--ink); }

/* ---------- 弹窗（下载） ---------- */
.modal-mask {
  position: fixed; inset: 0; z-index: 90; background: rgba(20, 35, 28, 0.55);
  display: none; align-items: center; justify-content: center; padding: 20px;
}
.modal-mask.open { display: flex; }
.modal {
  background: var(--card); border-radius: 20px; max-width: 520px; width: 100%;
  padding: 34px; box-shadow: 0 24px 64px rgba(20,35,28,.35);
  animation: pop .3s var(--ease);
}
@keyframes pop { from { opacity: 0; transform: translateY(14px) scale(.98); } to { opacity: 1; transform: none; } }
.modal .m-ico { width: 52px; height: 52px; border-radius: 14px; background: var(--pine-soft); color: var(--pine); display: grid; place-items: center; margin-bottom: 16px; }
.modal .m-ico svg { width: 26px; height: 26px; }
.modal h3 { font-size: 1.3rem; margin-bottom: 6px; }
.modal .m-sub { font-size: .9rem; color: var(--ink-3); margin-bottom: 18px; }
.modal .m-row { display: flex; justify-content: space-between; gap: 16px; padding: 9px 0; border-bottom: 1px dashed var(--line); font-size: .93rem; }
.modal .m-row span { color: var(--ink-3); }
.modal .m-row b { font-weight: 600; text-align: right; }
.modal .m-steps { margin: 16px 0 0; padding: 0; list-style: none; counter-reset: st; }
.modal .m-steps li { counter-increment: st; position: relative; padding: 4px 0 4px 34px; font-size: .92rem; color: var(--ink-2); }
.modal .m-steps li::before {
  content: counter(st); position: absolute; left: 0; top: 6px;
  width: 22px; height: 22px; border-radius: 50%; background: var(--pine-soft); color: var(--pine);
  font-family: var(--font-display); font-size: .78rem; font-weight: 700;
  display: grid; place-items: center;
}
.modal-actions { display: flex; gap: 10px; margin-top: 24px; }
.modal-actions .btn { flex: 1; }
.modal-close {
  position: absolute; top: 18px; right: 18px; width: 34px; height: 34px; border-radius: 50%;
  border: 0; background: var(--paper-2); color: var(--ink-2); cursor: pointer; display: grid; place-items: center;
}
.modal-close svg { width: 16px; height: 16px; }

/* Toast */
.toast {
  position: fixed; left: 50%; bottom: 28px; transform: translate(-50%, 20px);
  background: var(--pine-deep); color: #F4F1E9; padding: 13px 22px; border-radius: 999px;
  font-size: .92rem; box-shadow: var(--shadow); z-index: 100;
  opacity: 0; pointer-events: none; transition: opacity .25s var(--ease), transform .25s var(--ease);
  display: flex; align-items: center; gap: 10px;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }
.toast svg { width: 18px; height: 18px; color: var(--amber); }

/* ---------- 新闻页 ---------- */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.news-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-lg); overflow: hidden; display: flex; flex-direction: column; transition: transform .25s var(--ease), box-shadow .25s var(--ease); }
.news-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.news-card .nc-img { aspect-ratio: 16 / 9; overflow: hidden; position: relative; }
.news-card .nc-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s var(--ease); }
.news-card:hover .nc-img img { transform: scale(1.045); }
.news-card .nc-tag {
  position: absolute; left: 14px; top: 14px; background: rgba(246,243,236,.92);
  color: var(--pine); font-size: .78rem; font-weight: 600; padding: 4px 12px; border-radius: 999px;
}
.news-card .nc-body { padding: 20px 22px 24px; display: flex; flex-direction: column; flex: 1; }
.news-card .nc-date { font-size: .8rem; color: var(--ink-3); font-family: var(--font-display); margin-bottom: 8px; }
.news-card h3 { font-size: 1.08rem; margin-bottom: 8px; line-height: 1.4; }
.news-card h3 a { color: var(--ink); }
.news-card h3 a:hover { color: var(--pine); }
.news-card p { font-size: .9rem; color: var(--ink-2); flex: 1; margin: 0 0 14px; }
.news-card .nc-more { font-size: .88rem; font-weight: 600; color: var(--pine); display: inline-flex; align-items: center; gap: 6px; }
.news-card .nc-more:hover { color: var(--pine-deep); }
.news-card .nc-more svg { width: 15px; height: 15px; transition: transform .2s var(--ease); }
.news-card:hover .nc-more svg { transform: translateX(4px); }

/* ---------- 文章详情页 ---------- */
.article { max-width: 760px; margin-inline: auto; }
.article .a-meta { display: flex; gap: 16px; align-items: center; color: var(--ink-3); font-size: .88rem; font-family: var(--font-display); margin: 14px 0 28px; flex-wrap: wrap; }
.article .a-tag { background: var(--pine-soft); color: var(--pine); padding: 3px 12px; border-radius: 999px; font-weight: 600; }
.article .a-cover { border-radius: var(--radius-lg); overflow: hidden; margin-bottom: 32px; box-shadow: var(--shadow-sm); }
.article .a-cover img { width: 100%; height: auto; }
.article-body { font-size: 1.02rem; }
.article-body p { margin-bottom: 1.35em; }
.article-body h2 { font-size: 1.3rem; margin: 1.6em 0 .7em; }
.article-body blockquote {
  margin: 1.6em 0; padding: 4px 0 4px 20px; border-left: 3px solid var(--amber);
  color: var(--ink-2); font-style: normal;
}
.a-back { display: inline-flex; align-items: center; gap: 8px; font-size: .92rem; font-weight: 600; margin-top: 40px; }
.a-back svg { width: 16px; height: 16px; }

/* ---------- 关于页 ---------- */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(32px, 5vw, 64px); align-items: center; }
.about-grid img { border-radius: var(--radius-lg); box-shadow: var(--shadow); }
.values-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.values-grid .card { padding: 24px; }
.values-grid .card h3 { font-size: 1rem; }
.values-grid .card p { font-size: .86rem; }
.milestone { position: relative; padding-left: 34px; }
.milestone::before { content: ""; position: absolute; left: 9px; top: 8px; bottom: -8px; width: 2px; background: var(--line-strong); }
.milestone .ms-item { position: relative; padding: 0 0 30px 0; }
.milestone .ms-item::before {
  content: ""; position: absolute; left: -33px; top: 9px; width: 14px; height: 14px; border-radius: 50%;
  background: var(--paper); border: 3px solid var(--pine);
}
.milestone .ms-item:last-child { padding-bottom: 0; }
.milestone .ms-item:last-child::before { background: var(--amber); border-color: var(--amber); }
.milestone .ms-year { font-family: var(--font-display); font-weight: 700; color: var(--pine); font-size: .95rem; }
.milestone .ms-title { font-weight: 600; font-size: 1.02rem; margin: 2px 0 4px; }
.milestone .ms-desc { color: var(--ink-2); font-size: .92rem; margin: 0; }
.contact-box { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 30px; }
.contact-box h3 { font-size: 1.15rem; margin-bottom: 16px; }
.contact-list { list-style: none; margin: 0; padding: 0; }
.contact-list li { display: flex; gap: 12px; padding: 10px 0; border-bottom: 1px dashed var(--line); font-size: .95rem; align-items: baseline; }
.contact-list li:last-child { border-bottom: 0; }
.contact-list svg { flex: 0 0 auto; width: 17px; height: 17px; transform: translateY(3px); color: var(--pine); }
.contact-list span { color: var(--ink-3); flex: 0 0 76px; }

/* ---------- 响应式 ---------- */
@media (max-width: 980px) {
  .feature-grid, .feat-grid, .news-grid { grid-template-columns: repeat(2, 1fr); }
  .platform-strip { grid-template-columns: repeat(3, 1fr); }
  .values-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .process-grid { grid-template-columns: repeat(2, 1fr); gap: 30px 0; }
  .process-grid::before { display: none; }
  .showcase-grid, .about-grid, .security-band { grid-template-columns: 1fr; }
  .hero-grid { grid-template-columns: 1fr; }
  .hero-art { order: -1; }
  .hero-art img { width: min(300px, 70%); }
  .hero-badge { left: 6%; }
}
@media (max-width: 720px) {
  .main-nav {
    position: fixed; inset: 68px 0 auto 0; flex-direction: column; align-items: stretch;
    background: var(--card); border-bottom: 1px solid var(--line); box-shadow: var(--shadow);
    padding: 12px 16px 20px; gap: 2px; display: none;
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 12px 16px; font-size: 1.02rem; }
  .main-nav a.on::after { display: none; }
  .nav-cta { margin: 8px 0 0; }
  .nav-toggle { display: inline-flex; }
  .feature-grid, .feat-grid, .news-grid, .dl-grid { grid-template-columns: 1fr; }
  .platform-strip { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .values-grid { grid-template-columns: 1fr 1fr; }
  .section { padding: 56px 0; }
}

/* ---------- 动效 / 无障碍 ---------- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; }
}