/* ============ TokenX 设计系统 ============ */
:root {
  --navy: #0A1628;
  --navy-2: #10203A;
  --navy-3: #1B2E4D;
  --accent: #06B6D4;
  --accent-2: #22D3EE;
  --gold: #F59E0B;
  --up: #E24B4A;      /* 涨-红 */
  --down: #16A34A;    /* 跌-绿 */
  --bg: #F5F7FB;
  --card: #FFFFFF;
  --line: #E5EAF2;
  --t1: #0F172A;
  --t2: #5B6B84;
  --t3: #94A3B8;
  --purple: #7C3AED;
  --radius: 14px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--t1);
  font-size: 14px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, select, textarea { font-family: inherit; font-size: 14px; outline: none; }
.mono { font-family: "SF Mono", Consolas, "Courier New", monospace; }

/* ============ 顶部导航 ============ */
.topnav {
  position: sticky; top: 0; z-index: 100;
  background: var(--navy);
  color: #fff;
}
.topnav-inner {
  max-width: 1320px; margin: 0 auto;
  display: flex; align-items: center; gap: 20px;
  padding: 0 24px; height: 62px;
}
.logo { display: flex; align-items: center; gap: 10px; cursor: pointer; flex-shrink: 0; }
.logo-mark {
  width: 34px; height: 34px; border-radius: 9px;
  background: linear-gradient(135deg, var(--accent) 0%, #3B82F6 100%);
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 17px; color: #fff;
}
.logo-text { line-height: 1.15; }
.logo-text b { font-size: 17px; letter-spacing: .5px; }
.logo-text span { display: block; font-size: 10.5px; color: #7C93B5; letter-spacing: 2px; }
.nav-links { display: flex; gap: 2px; flex: 1; min-width: 0; overflow-x: auto; scrollbar-width: none; }
.nav-links::-webkit-scrollbar { display: none; }
.nav-links a {
  padding: 7px 12px; border-radius: 8px; font-size: 14px; color: #B9C6DA;
  transition: all .18s; white-space: nowrap; flex-shrink: 0;
}
.nav-links a:hover { color: #fff; background: rgba(255,255,255,.07); }
.nav-links a.active { color: #fff; background: rgba(6,182,212,.16); }
.nav-search {
  display: flex; align-items: center; gap: 8px; flex-shrink: 0;
  background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.12);
  border-radius: 9px; padding: 6px 12px; width: 200px;
}
.nav-search input { background: none; border: none; color: #fff; width: 100%; font-size: 13px; }
.nav-search input::placeholder { color: #64789A; }
.user-zone { display: flex; align-items: center; gap: 12px; position: relative; }
.balance-chip {
  display: flex; align-items: center; gap: 6px;
  background: rgba(245,158,11,.12); border: 1px solid rgba(245,158,11,.35);
  color: #FCD34D; font-size: 13px; padding: 5px 12px; border-radius: 20px;
  cursor: pointer;
}
.avatar {
  width: 34px; height: 34px; border-radius: 50%;
  background: linear-gradient(135deg, #7C3AED, #3B82F6);
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 13px; font-weight: 600; cursor: pointer;
}
.user-menu {
  position: absolute; top: 46px; right: 0; width: 220px;
  background: #fff; border-radius: 12px; box-shadow: 0 12px 40px rgba(10,22,40,.18);
  padding: 8px; color: var(--t1); display: none;
}
.user-menu.open { display: block; }
.user-menu .um-item {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 12px; border-radius: 8px; cursor: pointer; font-size: 13.5px;
}
.user-menu .um-item:hover { background: var(--bg); }
.um-head { padding: 10px 12px; border-bottom: 1px solid var(--line); margin-bottom: 6px; }
.um-head b { font-size: 14px; }
.um-head span { display: block; font-size: 12px; color: var(--t3); }

/* ============ 行情 Ticker ============ */
.ticker-bar {
  background: var(--navy-2);
  border-bottom: 1px solid rgba(255,255,255,.06);
  overflow: hidden; white-space: nowrap;
}
.ticker-track { display: inline-flex; gap: 44px; padding: 8px 0; animation: ticker 40s linear infinite; }
@keyframes ticker { from { transform: translateX(0); } to { transform: translateX(-50%); } }
.ticker-item { display: inline-flex; align-items: center; gap: 8px; font-size: 12.5px; color: #9DB0CC; cursor: pointer; }
.ticker-item b { color: #E6EDF7; font-weight: 500; }
.chg-up { color: #F87171 !important; }
.chg-down { color: #4ADE80 !important; }

/* ============ 布局 ============ */
.container { max-width: 1320px; margin: 0 auto; padding: 0 24px; }
.page { padding: 28px 0 64px; min-height: 70vh; }
.card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 22px;
}
.section-title { display: flex; align-items: center; justify-content: space-between; margin: 36px 0 16px; }
.section-title h2 { font-size: 20px; font-weight: 700; letter-spacing: -.3px; }
.section-title .sub { font-size: 13px; color: var(--t3); }
.grid { display: grid; gap: 16px; }

/* ============ 按钮 ============ */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 7px;
  padding: 10px 20px; border-radius: 10px; font-size: 14px; font-weight: 600;
  transition: all .18s; border: 1px solid transparent;
}
.btn-primary { background: linear-gradient(135deg, #0891B2, #06B6D4); color: #fff; box-shadow: 0 4px 14px rgba(6,182,212,.3); }
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 6px 20px rgba(6,182,212,.4); }
.btn-dark { background: var(--navy); color: #fff; }
.btn-dark:hover { background: var(--navy-3); }
.btn-ghost { background: #fff; border-color: var(--line); color: var(--t1); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn-gold { background: linear-gradient(135deg, #D97706, #F59E0B); color: #fff; }
.btn-danger { background: #FEF2F2; color: #DC2626; border-color: #FECACA; }
.btn-sm { padding: 6px 14px; font-size: 13px; border-radius: 8px; }
.btn-lg { padding: 13px 30px; font-size: 15.5px; }
.btn:disabled { opacity: .45; cursor: not-allowed; transform: none !important; }

/* ============ Hero ============ */
.hero {
  background: var(--navy);
  color: #fff; position: relative; overflow: hidden;
}
.hero::before {
  content: ""; position: absolute; right: -120px; top: -140px;
  width: 480px; height: 480px; border-radius: 50%;
  background: radial-gradient(circle, rgba(6,182,212,.22), transparent 65%);
}
.hero::after {
  content: ""; position: absolute; left: -80px; bottom: -180px;
  width: 380px; height: 380px; border-radius: 50%;
  background: radial-gradient(circle, rgba(124,58,237,.16), transparent 65%);
}
.hero-inner {
  max-width: 1320px; margin: 0 auto; padding: 64px 24px 56px;
  display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; position: relative; z-index: 1;
}
.hero-tag {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(6,182,212,.12); border: 1px solid rgba(6,182,212,.3);
  color: var(--accent-2); font-size: 12.5px; padding: 5px 14px; border-radius: 20px;
  margin-bottom: 20px;
}
.hero h1 { font-size: 42px; font-weight: 800; line-height: 1.22; letter-spacing: -1px; }
.hero h1 em { font-style: normal; background: linear-gradient(90deg, var(--accent-2), #60A5FA); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p.lead { margin: 18px 0 28px; color: #9DB0CC; font-size: 15.5px; max-width: 480px; }
.hero-cta { display: flex; gap: 12px; }
.hero-stats { display: flex; gap: 40px; margin-top: 40px; }
.hero-stats .hs b { font-size: 24px; font-weight: 700; letter-spacing: -.5px; }
.hero-stats .hs span { display: block; font-size: 12px; color: #7C93B5; margin-top: 2px; }

/* 行情卡 */
.idx-card {
  background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.1);
  border-radius: 16px; padding: 22px; backdrop-filter: blur(8px);
}
.idx-head { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 6px; }
.idx-head b { font-size: 15px; color: #CBD8EA; }
.idx-price { font-size: 38px; font-weight: 800; letter-spacing: -1px; }
.idx-chg { font-size: 14px; margin-left: 10px; }
.idx-meta { display: flex; gap: 24px; margin: 14px 0; font-size: 12px; color: #7C93B5; }
.idx-meta b { display: block; color: #E6EDF7; font-size: 14px; margin-top: 2px; }
.mini-rows { margin-top: 12px; border-top: 1px solid rgba(255,255,255,.08); padding-top: 12px; display: grid; gap: 9px; }
.mini-row { display: flex; justify-content: space-between; font-size: 12.5px; color: #9DB0CC; }
.mini-row b { color: #E6EDF7; font-weight: 500; }

/* ============ 统计条 ============ */
.stat-strip { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: -34px; position: relative; z-index: 5; }
.stat-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 22px; display: flex; gap: 14px; align-items: center; }
.stat-ico { width: 42px; height: 42px; border-radius: 11px; display: flex; align-items: center; justify-content: center; font-size: 19px; flex-shrink: 0; }
.stat-card b { font-size: 21px; font-weight: 700; letter-spacing: -.4px; display: block; }
.stat-card span { font-size: 12.5px; color: var(--t3); }

/* ============ 表格 ============ */
.tbl { width: 100%; border-collapse: collapse; }
.tbl th { text-align: left; font-size: 12px; color: var(--t3); font-weight: 500; padding: 10px 12px; border-bottom: 1px solid var(--line); white-space: nowrap; }
.tbl td { padding: 13px 12px; border-bottom: 1px solid #F1F4F9; font-size: 13.5px; vertical-align: middle; }
.tbl tr:last-child td { border-bottom: none; }
.tbl tr:hover td { background: #FAFCFE; }

/* ============ 市场筛选 ============ */
.filter-bar { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 20px; }
.chip {
  padding: 7px 16px; border-radius: 20px; font-size: 13px;
  background: #fff; border: 1px solid var(--line); color: var(--t2); cursor: pointer; transition: all .15s;
}
.chip:hover { border-color: var(--accent); color: var(--accent); }
.chip.active { background: var(--navy); color: #fff; border-color: var(--navy); }
.select-sm {
  padding: 7px 12px; border-radius: 9px; border: 1px solid var(--line);
  background: #fff; color: var(--t1); font-size: 13px; cursor: pointer;
}

/* ============ 商品卡 ============ */
.listing-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.lcard {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 20px; transition: all .2s; cursor: pointer; position: relative;
}
.lcard:hover { border-color: var(--accent); box-shadow: 0 10px 32px rgba(6,182,212,.1); transform: translateY(-2px); }
.lcard-top { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 12px; }
.vendor-badge {
  width: 40px; height: 40px; border-radius: 10px; color: #fff;
  display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 15px;
}
.tag { font-size: 11px; padding: 3px 9px; border-radius: 6px; font-weight: 500; }
.tag-hot { background: #FEF2F2; color: #DC2626; }
.tag-new { background: #ECFDF5; color: #059669; }
.tag-self { background: #EEF2FF; color: #6366F1; }
.lcard h3 { font-size: 15.5px; font-weight: 700; margin-bottom: 4px; }
.lcard .model-sub { font-size: 12px; color: var(--t3); margin-bottom: 14px; }
.lcard-price { display: flex; align-items: baseline; gap: 6px; }
.lcard-price b { font-size: 22px; font-weight: 800; color: var(--t1); letter-spacing: -.5px; }
.lcard-price span { font-size: 12px; color: var(--t3); }
.lcard-unit { font-size: 12px; color: var(--t3); margin-top: 4px; }
.lcard-unit b { color: var(--t2); font-weight: 600; }
.lcard.soldout { opacity: .62; }
.lcard.soldout .lcard-price b { color: var(--t3); text-decoration: line-through; }
.lcard:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.lcard-meta { display: flex; justify-content: space-between; margin-top: 14px; padding-top: 13px; border-top: 1px dashed var(--line); font-size: 12px; color: var(--t3); }
.lcard-meta b { color: var(--t2); font-weight: 500; }

/* ============ 详情页 ============ */
.detail-grid { display: grid; grid-template-columns: 1.5fr 1fr; gap: 20px; align-items: start; }
.price-box { font-size: 30px; font-weight: 800; letter-spacing: -.5px; }
.price-box small { font-size: 13px; color: var(--t3); font-weight: 400; }
.unit-hint { font-size: 13px; color: var(--t2); margin-top: 8px; }
.unit-hint b { color: var(--t1); font-weight: 700; }
.result-bar { font-size: 13px; color: var(--t3); margin: -6px 0 14px; }
.result-bar b { color: var(--t1); font-weight: 700; }
.notice {
  background: #F8FAFD; border: 1px dashed var(--line); border-radius: 10px;
  padding: 12px 14px; font-size: 13px; color: var(--t2); flex: 1; text-align: center;
}
.calc-row { display: flex; gap: 10px; align-items: center; margin: 14px 0; }
.calc-row input { flex: 1; padding: 10px 14px; border: 1px solid var(--line); border-radius: 10px; }
.calc-total { background: #F0FBFD; border: 1px solid #C9EEF6; border-radius: 10px; padding: 14px 16px; display: flex; justify-content: space-between; align-items: center; }
.calc-total b { font-size: 20px; color: #0891B2; }

/* ============ 状态徽章 ============ */
.status { display: inline-flex; align-items: center; gap: 6px; font-size: 12.5px; padding: 4px 11px; border-radius: 20px; font-weight: 500; }
.st-pay { background: #FFF7ED; color: #D97706; }
.st-escrow { background: #EEF2FF; color: #6366F1; }
.st-deliver { background: #ECFEFF; color: #0891B2; }
.st-done { background: #ECFDF5; color: #059669; }
.st-cancel { background: #F4F4F5; color: #71717A; }

/* ============ 卖家工作台 ============ */
.seller-layout { display: grid; grid-template-columns: 210px 1fr; gap: 20px; align-items: start; }
.side-nav { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 10px; position: sticky; top: 84px; }
.side-nav a { display: flex; align-items: center; gap: 10px; padding: 10px 14px; border-radius: 9px; font-size: 13.5px; color: var(--t2); cursor: pointer; }
.side-nav a:hover { background: var(--bg); color: var(--t1); }
.side-nav a.active { background: var(--navy); color: #fff; }
.kpi-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-bottom: 20px; }
.kpi { background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 16px 18px; }
.kpi span { font-size: 12.5px; color: var(--t3); }
.kpi b { display: block; font-size: 22px; font-weight: 700; letter-spacing: -.4px; margin-top: 4px; }
.kpi .delta { font-size: 11.5px; margin-top: 4px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form-item label { display: block; font-size: 13px; color: var(--t2); margin-bottom: 6px; font-weight: 500; }
.form-item input, .form-item select, .form-item textarea {
  width: 100%; padding: 10px 13px; border: 1px solid var(--line); border-radius: 10px;
  transition: border .15s; background: #fff;
}
.form-item input:focus, .form-item select:focus, .form-item textarea:focus { border-color: var(--accent); }
.form-item .hint { font-size: 11.5px; color: var(--t3); margin-top: 4px; }

/* 渠道卡 */
.channel-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 20px; }
.chan-head { display: flex; align-items: center; gap: 12px; }
.chan-logo { width: 42px; height: 42px; border-radius: 10px; display: flex; align-items: center; justify-content: center; color: #fff; font-weight: 700; font-size: 15px; }
.bal-bar { height: 6px; border-radius: 4px; background: #EEF2F7; overflow: hidden; margin: 12px 0 6px; }
.bal-bar i { display: block; height: 100%; border-radius: 4px; }

/* ============ 兑换码 ============ */
.code-box {
  background: var(--navy); color: #fff; border-radius: 12px;
  padding: 16px 20px; display: flex; align-items: center; justify-content: space-between;
}
.code-box .mono { font-size: 16px; letter-spacing: 1.5px; color: var(--accent-2); }

/* ============ 弹层 / Toast ============ */
.modal-mask {
  position: fixed; inset: 0; background: rgba(10,22,40,.5); z-index: 200;
  display: flex; align-items: center; justify-content: center; backdrop-filter: blur(3px);
}
.modal { background: #fff; border-radius: 16px; width: 480px; max-width: 92vw; max-height: 86vh; overflow: auto; padding: 26px; }
.modal h3 { font-size: 17px; margin-bottom: 4px; }
.modal .m-sub { font-size: 13px; color: var(--t3); margin-bottom: 18px; }

/* ============ 认证：登录 / 注册 ============ */
.auth-tabs {
  display: flex; gap: 4px; background: var(--bg); border-radius: 11px;
  padding: 4px; margin-bottom: 20px;
}
.auth-tabs span {
  flex: 1; text-align: center; padding: 9px 0; border-radius: 8px;
  font-size: 14px; font-weight: 600; color: var(--t2); cursor: pointer; transition: all .15s;
}
.auth-tabs span:hover { color: var(--t1); }
.auth-tabs span.active { background: #fff; color: var(--navy); box-shadow: 0 2px 8px rgba(10,22,40,.08); }
.auth-row {
  display: flex; align-items: center; justify-content: space-between;
  margin: 14px 0 4px; font-size: 13px;
}
.auth-row a, .auth-alt a { color: #0891B2; cursor: pointer; }
.auth-alt { text-align: center; font-size: 13px; color: var(--t3); margin-top: 18px; }
.ck { display: inline-flex; align-items: center; gap: 7px; cursor: pointer; color: var(--t2); font-size: 13px; }
.ck input { width: 15px; height: 15px; accent-color: var(--accent); cursor: pointer; }
.ck-block { align-items: flex-start; line-height: 1.6; }
.ck-block input { margin-top: 2px; flex-shrink: 0; }
.modal .form-item { margin-bottom: 13px; }
.modal .form-item label { font-size: 12.5px; margin-bottom: 5px; }

/* ============ 有效期档位选择 ============ */
.tier-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.tier {
  border: 1px solid var(--line); border-radius: 10px; padding: 10px 8px;
  text-align: center; cursor: pointer; transition: all .15s; background: #fff;
}
.tier:hover { border-color: var(--accent); }
.tier b { display: block; font-size: 13.5px; color: var(--t1); }
.tier em { display: block; font-style: normal; font-size: 12px; color: var(--t3); margin-top: 2px; }
.tier .tier-off { display: block; font-size: 11px; color: #16A34A; margin-top: 1px; }
.tier.active { border-color: var(--accent); background: #F0FBFD; box-shadow: 0 0 0 2px rgba(6,182,212,.12); }
.tier.active b { color: #0891B2; }
.tier.active .tier-off { color: #E24B4A; }
@media (max-width: 480px) { .tier-grid { grid-template-columns: repeat(2, 1fr); } }

/* ============ 自研模型页 ============ */
.self-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.selfcard { display: flex; flex-direction: column; }
.selfcard .tbl td { padding: 9px 12px; font-size: 13px; }
@media (max-width: 1024px) { .self-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .self-grid { grid-template-columns: 1fr; } }

#toast-wrap {
  position: fixed; top: 72px; right: 20px; z-index: 300;
  display: grid; gap: 10px; max-width: min(380px, calc(100vw - 40px));
  pointer-events: none;
}
.toast {
  background: var(--navy); color: #fff; padding: 12px 18px; border-radius: 11px;
  font-size: 13.5px; box-shadow: 0 8px 28px rgba(10,22,40,.25);
  display: flex; align-items: center; gap: 9px; animation: slideIn .25s ease;
  pointer-events: auto;
}
.toast.ok i { color: #34D399; } .toast.warn i { color: #FBBF24; } .toast.err i { color: #F87171; }
@keyframes slideIn { from { transform: translateX(30px); opacity: 0; } to { transform: none; opacity: 1; } }

/* ============ 流程步骤 ============ */
.flow-steps { display: grid; grid-template-columns: repeat(6, 1fr); gap: 10px; position: relative; }
.flow-step { text-align: center; padding: 18px 8px; background: #fff; border: 1px solid var(--line); border-radius: 12px; }
.flow-step .fs-n {
  width: 30px; height: 30px; border-radius: 50%; margin: 0 auto 10px;
  background: #E0F7FC; color: #0891B2; font-weight: 700; font-size: 13px;
  display: flex; align-items: center; justify-content: center;
}
.flow-step b { display: block; font-size: 13px; margin-bottom: 3px; }
.flow-step span { font-size: 11.5px; color: var(--t3); }

/* ============ 信任区 ============ */
.trust-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.trust-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
.trust-card .t-ico { width: 44px; height: 44px; border-radius: 12px; display: flex; align-items: center; justify-content: center; font-size: 20px; margin-bottom: 14px; }
.trust-card h3 { font-size: 15.5px; margin-bottom: 8px; }
.trust-card p { font-size: 13px; color: var(--t2); }

/* ============ Footer ============ */
.footer { background: var(--navy); color: #7C93B5; margin-top: 60px; }
.footer-inner { max-width: 1320px; margin: 0 auto; padding: 44px 24px 28px; display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 32px; }
.footer h4 { color: #E6EDF7; font-size: 13.5px; margin-bottom: 14px; }
.footer a { display: block; font-size: 13px; padding: 4px 0; cursor: pointer; }
.footer a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.08); text-align: center; padding: 18px; font-size: 12px; }

/* ============ 空状态 ============ */
.empty { text-align: center; padding: 60px 20px; color: var(--t3); }
.empty .e-ico { font-size: 40px; margin-bottom: 12px; }

/* ============ 代码块 ============ */
.codeblock {
  background: var(--navy); color: #D7E3F4; border-radius: 12px;
  padding: 18px 20px; font-size: 12.5px; line-height: 1.75;
  overflow-x: auto; font-family: "SF Mono", Consolas, monospace;
}
.codeblock .ck { color: #7DD3FC; } .codeblock .cs { color: #86EFAC; } .codeblock .cc { color: #64789A; }

@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; }
  .listing-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-strip, .kpi-grid { grid-template-columns: repeat(2, 1fr); }
  .detail-grid, .seller-layout, .trust-grid { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .flow-steps { grid-template-columns: repeat(3, 1fr); }
  .nav-search { display: none; }
  .form-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .hero h1 { font-size: 28px; }
  .hero-inner { padding: 40px 20px 36px; gap: 28px; }
  .hero-stats { gap: 24px; flex-wrap: wrap; }
  .stat-strip, .kpi-grid { grid-template-columns: 1fr 1fr; }
  .listing-grid { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; }
  .flow-steps { grid-template-columns: repeat(2, 1fr); }
  .topnav-inner { height: 56px; padding: 0 14px; gap: 10px; }
  /* 导航项过多时改为横向滚动，避免把用户区挤出视口 */
  .nav-links { overflow-x: auto; scrollbar-width: none; -webkit-overflow-scrolling: touch; flex: 1 1 auto; min-width: 0; }
  .nav-links::-webkit-scrollbar { display: none; }
  .nav-links a { padding: 6px 9px; font-size: 13px; white-space: nowrap; flex-shrink: 0; }
  .logo-text span { display: none; }
  .logo-text b { font-size: 15px; }
  .user-zone { flex-shrink: 0; gap: 8px; }
  .container { padding: 0 16px; }
  /* 表格在窄屏横向滚动，避免挤压列内容 */
  .card { padding: 16px; overflow-x: auto; }
  .tbl { min-width: 520px; }
  .modal { padding: 20px; }
  .trust-card { padding: 18px; }
}

/* 模态打开时锁定背景滚动 */
body.modal-open { overflow: hidden; }

/* 键盘可达性：统一焦点环 */
a:focus-visible, button:focus-visible, input:focus-visible,
select:focus-visible, textarea:focus-visible, [tabindex]:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 6px;
}

/* 尊重用户的减少动效偏好 */
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .ticker-track { animation: none; }
  html { scroll-behavior: auto; }
}