/* 企点协同官网 · 视觉母版
   来源：2026-09-08 用户定稿 v9 系列（index.html），仅做抽取/增补，不改变观感。 */

:root {
  --ink: #0b1020;
  --white: #ffffff;
  --white-soft: rgba(255,255,255,.82);
  --white-muted: rgba(255,255,255,.5);
  --line: rgba(255,255,255,.14);
  --brand: #2563eb;
  --text-main: #1f2937;
  --text-sub: #6b7280;
}

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

html, body { min-height: 100%; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", sans-serif;
  color: var(--white);
  background: var(--ink);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

/* Background */
.bg {
  position: fixed;
  inset: 0;
  z-index: -3;
  background:
    radial-gradient(circle at 18% 12%, rgba(96,165,250,.42) 0%, transparent 44%),
    radial-gradient(circle at 84% 16%, rgba(34,211,238,.34) 0%, transparent 40%),
    radial-gradient(circle at 70% 84%, rgba(168,85,247,.4) 0%, transparent 46%),
    radial-gradient(circle at 20% 92%, rgba(236,72,153,.32) 0%, transparent 42%),
    linear-gradient(160deg, #0c1237 0%, #1b2a86 26%, #1d4ed8 46%, #6d28d9 70%, #9d174d 100%);
}

.glow {
  position: fixed;
  top: 0; left: 0;
  width: 460px; height: 460px;
  margin-left: -230px; margin-top: -230px;
  z-index: -2;
  border-radius: 50%;
  pointer-events: none;
  background: radial-gradient(circle, rgba(167,139,250,.6) 0%, rgba(96,165,250,.4) 42%, rgba(244,114,182,.28) 62%, transparent 75%);
  filter: blur(26px);
  opacity: .6;
  will-change: transform;
}

.stripes {
  position: fixed;
  inset: -10% -20%;
  z-index: -2;
  background:
    repeating-linear-gradient(90deg,
      transparent 0px,
      transparent 92px,
      rgba(255,255,255,.05) 92px,
      rgba(255,255,255,.05) 93px,
      transparent 93px,
      transparent 240px);
  filter: none;
  animation: stripe-drift 26s ease-in-out infinite alternate;
  opacity: .9;
}

@keyframes stripe-drift {
  0% { transform: translateX(0) scale(1); }
  100% { transform: translateX(-3%) scale(1.04); }
}

.grain {
  position: fixed;
  inset: 0;
  z-index: 0;
  opacity: .018;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* Header like QQ */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: 60px;
  padding: 0 6%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(255,255,255,.96);
  border-bottom: 1px solid rgba(0,0,0,.06);
  box-shadow: 0 1px 2px rgba(0,0,0,.04);
  transition: background .25s, box-shadow .25s;
}

.site-header.is-scrolled {
  background: rgba(255,255,255,.98);
  box-shadow: 0 2px 8px rgba(0,0,0,.06);
}

.brand {
  display: flex; align-items: center; gap: 10px;
  color: #111827; font-weight: 800; font-size: 18px;
}

.brand__mark {
  width: 30px; height: 30px;
  display: flex; align-items: center; justify-content: center;
}

.brand__mark img { width: 28px; height: 28px; object-fit: contain; }

.nav { display: flex; align-items: center; gap: 28px; }

.nav__links {
  display: flex; gap: 38px; list-style: none;
  font-size: 15px; color: #374151;
}

.nav__links a {
  position: relative; padding: 4px 0;
  transition: color .2s;
  display: inline-flex; align-items: center; gap: 5px;
}

.nav__links a:hover,
.nav__links a.is-active { color: var(--brand); }
.nav__links a.is-active { font-weight: 500; }

.nav__links .has-arrow::after {
  content: "";
  width: 0; height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 4px solid currentColor;
  opacity: .7;
}

.nav__user {
  font-size: 15px; font-weight: 500; color: #374151;
  transition: color .2s;
}

.nav__user:hover { color: var(--brand); }

.menu-toggle { display: none; background: none; border: none; cursor: pointer; padding: 4px; }
.menu-toggle span { display: block; width: 22px; height: 2px; background: #374151; margin: 5px 0; border-radius: 1px; }

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  text-align: center;
  padding: 120px 5% 140px;
  z-index: 1;
}

.hero__logo {
  height: 120px;
  max-width: 88vw;
  margin-bottom: 34px;
  display: flex; align-items: center; justify-content: center;
}

.hero__logo img {
  height: 100%;
  width: auto;
  max-width: 100%;
  display: block;
  filter: drop-shadow(0 2px 8px rgba(0,0,0,.18));
}

.hero__title {
  font-size: clamp(36px, 6.2vw, 78px);
  font-weight: 700;
  letter-spacing: .02em;
  line-height: 1.15;
  margin-bottom: 16px;
  text-shadow: 0 0 48px rgba(255,255,255,.22), 0 4px 24px rgba(0,0,0,.18);
}

.hero__subtitle {
  font-size: clamp(20px, 2.5vw, 28px);
  font-weight: 300;
  color: var(--white-soft);
  margin-bottom: 10px;
  letter-spacing: .04em;
}

.hero__version {
  font-size: 13px; color: var(--white-muted);
  margin-bottom: 36px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

.btn-download {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 16px 38px;
  border-radius: 999px;
  background: var(--white); color: var(--ink);
  font-size: 17px; font-weight: 600;
  box-shadow: 0 10px 34px rgba(0,0,0,.2), 0 0 0 1px rgba(255,255,255,.12);
  transition: transform .2s, box-shadow .2s, background .2s;
  cursor: pointer; border: none;
}

.btn-download:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 16px 46px rgba(0,0,0,.26), 0 0 0 1px rgba(255,255,255,.2);
  background: rgba(255,255,255,.96);
}

.btn-download svg { width: 22px; height: 22px; }

.hero__more {
  margin-top: 16px;
  font-size: 14px; color: var(--white-soft);
  display: inline-flex; align-items: center; gap: 4px;
  transition: color .2s;
}

.hero__more:hover { color: var(--white); }
.hero__more svg { width: 14px; height: 14px; }

/* Platform switcher */
.platforms {
  margin-top: 40px;
  display: inline-flex; flex-wrap: wrap; justify-content: center; gap: 8px;
  padding: 10px;
  border-radius: 999px;
  background: rgba(255,255,255,.08);
  border: 1px solid var(--line);
  backdrop-filter: blur(12px);
}

.platforms__item {
  display: flex; align-items: center; gap: 7px;
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 13px; color: var(--white-soft);
  cursor: pointer;
  transition: background .2s, color .2s;
  white-space: nowrap;
}

.platforms__item:hover,
.platforms__item.is-active { background: rgba(255,255,255,.16); color: var(--white); }

.platforms__item svg { width: 16px; height: 16px; }

/* Footer links - centered like QQ */
.footer {
  width: 100%;
  padding: 22px 5% 28px;
  display: flex; justify-content: center;
  font-size: 13px; color: var(--white-muted);
  z-index: 1;
}

.footer__links {
  display: inline-flex; align-items: center; gap: 8px;
  list-style: none; flex-wrap: wrap; justify-content: center;
}

.footer__links a {
  padding: 4px 10px;
  transition: color .2s;
}

.footer__links a:hover { color: var(--white); }

.footer__divider {
  width: 1px; height: 12px; background: var(--line);
}

/* Entrance */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .7s ease, transform .7s ease;
}
.reveal.is-visible { opacity: 1; transform: translateY(0); }

/* ============================================================
   Inner pages（下载/购买/支持/账号/个人中心/后台）
   延续 v9 语言：白导航 + 极光深色标题带 + 白色内容卡
   ============================================================ */
.page-main { position: relative; z-index: 1; min-height: calc(100vh - 160px); }

.page-top {
  max-width: 1120px;
  margin: 0 auto;
  padding: 150px 5% 46px;
  text-align: center;
}

.page-top .eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 14px; letter-spacing: .18em;
  color: var(--white-soft); text-transform: uppercase;
  margin-bottom: 18px;
}
.page-top .eyebrow::before { content: ""; width: 26px; height: 1px; background: rgba(255,255,255,.4); }
.page-top .eyebrow::after  { content: ""; width: 26px; height: 1px; background: rgba(255,255,255,.4); }

.page-top h1 {
  font-size: clamp(30px, 4.4vw, 52px);
  font-weight: 800; letter-spacing: .01em;
  margin-bottom: 14px;
  text-shadow: 0 0 40px rgba(255,255,255,.2);
}

.page-top .lead {
  font-size: clamp(15px, 1.6vw, 18px);
  color: var(--white-soft); font-weight: 300;
  max-width: 640px; margin: 0 auto;
}

.page-body {
  max-width: 1120px;
  width: calc(100% - 40px);
  margin: -26px auto 56px;
  background: #fff;
  color: var(--text-main);
  border-radius: 20px;
  padding: 38px 44px;
  box-shadow: 0 26px 80px rgba(4, 10, 46, .34);
}

.page-body h2 { font-size: 22px; margin: 30px 0 14px; color: #111827; }
.page-body h2:first-child { margin-top: 0; }
.page-body h3 { font-size: 17px; margin: 18px 0 8px; color: #111827; }
.page-body p { line-height: 1.85; color: #374151; }
.page-body p + p { margin-top: 10px; }
.page-body .muted { color: var(--text-sub); }

/* 页内小标题带横条 */
.section-title { display: flex; align-items: center; gap: 10px; font-weight: 800; }
.section-title::before { content: ""; width: 4px; height: 18px; border-radius: 2px; background: linear-gradient(#2563eb,#7c3aed); }

/* 通用深字按钮 */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border-radius: 10px; padding: 11px 22px; font-size: 15px; font-weight: 600;
  border: 1px solid transparent; cursor: pointer; transition: all .18s; line-height: 1; }
.btn-primary { background: var(--brand); color: #fff; }
.btn-primary:hover { background: #1d4ed8; box-shadow: 0 6px 18px rgba(37,99,235,.28); }
.btn-ghost { background: transparent; color: var(--brand); border-color: #d1d5db; }
.btn-ghost:hover { border-color: var(--brand); }
.btn-dark { background: #111827; color: #fff; }
.btn-dark:hover { background: #1f2937; }
.btn-danger { background: #fff; color: #dc2626; border-color: #fecaca; }
.btn-danger:hover { background: #fef2f2; }
.btn-warning { background: #fff; color: #d97706; border-color: #fde68a; }
.btn-warning:hover { background: #fffbeb; border-color: #d97706; }
.btn-sm { padding: 7px 14px; font-size: 13px; border-radius: 8px; }
.btn[disabled] { opacity: .55; cursor: not-allowed; }

/* 表格 */
table.data { width: 100%; border-collapse: collapse; font-size: 14px; }
table.data th, table.data td { padding: 11px 12px; text-align: left; border-bottom: 1px solid #f0f1f4; vertical-align: middle; }
table.data th { background: #f8f9fb; color: #6b7280; font-weight: 600; font-size: 13px; white-space: nowrap; }
table.data tbody tr:hover { background: #fafbff; }
table.data td.num { font-variant-numeric: tabular-nums; }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 13px; }

/* 徽标 */
.badge { display: inline-flex; align-items: center; padding: 3px 10px; border-radius: 999px; font-size: 12px; font-weight: 600; }
.badge-green { background: #ecfdf5; color: #059669; }
.badge-gray { background: #f3f4f6; color: #6b7280; }
.badge-blue { background: #eff6ff; color: #2563eb; }
.badge-red { background: #fef2f2; color: #dc2626; }
.badge-amber { background: #fffbeb; color: #d97706; }

/* 表单 */
.field { margin-bottom: 18px; }
.field label { display: block; font-size: 13px; font-weight: 600; color: #374151; margin-bottom: 7px; }
.field input[type=text], .field input[type=password], .field input[type=number], .field input[type=email],
.field input[type=tel], .field textarea, .field select {
  width: 100%; padding: 10px 13px; font-size: 15px;
  border: 1px solid #e5e7eb; border-radius: 10px; color: #111827;
  background: #fbfbfd; transition: border .15s, box-shadow .15s, background .15s; outline: none;
}
.field textarea { resize: vertical; min-height: 96px; line-height: 1.6; }
.field input:focus, .field textarea:focus, .field select:focus {
  border-color: var(--brand); background: #fff;
  box-shadow: 0 0 0 4px rgba(37,99,235,.12);
}
.field .hint { font-size: 12px; color: var(--text-sub); margin-top: 6px; }
.field.error input { border-color: #dc2626; }
.err-text { color: #dc2626; font-size: 13px; margin: 6px 0; }

.form-card { max-width: 440px; margin: 0 auto; }

/* 通知 */
.notice { padding: 13px 16px; border-radius: 12px; font-size: 14px; margin-bottom: 18px; }
.notice-info { background: #eff6ff; color: #1e40af; border: 1px solid #bfdbfe; }
.notice-warn { background: #fffbeb; color: #92400e; border: 1px solid #fde68a; }
.notice-err { background: #fef2f2; color: #991b1b; border: 1px solid #fecaca; }
.notice-ok { background: #ecfdf5; color: #065f46; border: 1px solid #a7f3d0; }

/* 套餐卡 */
.plans-section { margin-bottom: 54px; }
.plans-section:last-of-type { margin-bottom: 0; }
.plans-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  justify-items: center;
  align-items: start;
  gap: 24px;
}
.plan-card { width: 100%; max-width: 340px; border: 1px solid #eef0f4; border-radius: 16px; padding: 26px 24px; background: #fff; display: flex; flex-direction: column; transition: box-shadow .2s, transform .2s; }
.plan-card:hover { box-shadow: 0 14px 40px rgba(20,30,90,.1); transform: translateY(-2px); }
.plan-card.is-featured { border: 2px solid var(--brand); box-shadow: 0 18px 46px rgba(37,99,235,.14); }
.plan-card .p-type { font-size: 12px; color: var(--brand); font-weight: 700; letter-spacing: .1em; }
.plan-card .p-title { font-size: 20px; font-weight: 800; margin: 8px 0 6px; color: #111827; }
.plan-card .p-sub { font-size: 13px; color: var(--text-sub); min-height: 40px; line-height: 1.6; }
.plan-card .p-price { margin: 16px 0; display: flex; align-items: baseline; gap: 6px; }
.plan-card .p-price b { font-size: 34px; font-weight: 800; color: #111827; }
.plan-card .p-price span { font-size: 13px; color: var(--text-sub); }
.plan-card ul { list-style: none; margin: 4px 0 20px; flex: 1; }
.plan-card li { font-size: 13.5px; color: #374151; padding: 5px 0 5px 22px; position: relative; }
.plan-card li::before { content: ""; position: absolute; left: 2px; top: 11px; width: 8px; height: 8px; border-radius: 50%; background: #dbeafe; }
.plan-card li b { color: #2563eb; }
.plan-card .btn { width: 100%; }

/* 购买页：许可卡直接浮于深色渐变，不再套白底大卡 */
.page-body--flat { margin: 8px auto 60px; }

.plans-hero {
  position: relative; z-index: 1;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 18px;
  max-width: 1320px;
  margin: 0 auto;
  padding: 24px 20px 0;
}
.plans-hero .plan-card { max-width: none; width: 100%; }
.tier-card { position: relative; flex: 1 1 300px; border-color: rgba(255,255,255,.65); box-shadow: 0 30px 80px rgba(2,7,30,.42); overflow: visible; }
.plans-hero > .tier-card:only-child { flex: 0 1 300px; max-width: 360px; }
.tier-card:hover { box-shadow: 0 22px 60px rgba(37,99,235,.22); transform: translateY(-4px); }
.tier-card.is-featured { border: 2px solid var(--brand); box-shadow: 0 26px 70px rgba(37,99,235,.3); }
.tier-card.is-pending { border: 2px dashed rgba(255,255,255,.45); box-shadow: none; opacity: .82; }
@media (max-width: 1100px) {
  .tier-card { flex-basis: calc(50% - 9px); }
}
@media (max-width: 600px) {
  .tier-card { flex-basis: 100%; }
}
.tier-badge {
  position: absolute; top: -14px; left: 50%; transform: translateX(-50%);
  background: linear-gradient(90deg,#2563eb,#7c3aed); color: #fff;
  font-size: 12px; font-weight: 700; letter-spacing: .06em;
  padding: 5px 15px; border-radius: 999px; white-space: nowrap;
  box-shadow: 0 10px 24px rgba(124,58,237,.4);
  z-index: 2;
}
.tier-badge--pending {
  background: rgba(255,255,255,.18);
  color: #fff;
  box-shadow: none;
  font-weight: 600;
}
.tier-cta { margin-top: 6px; }
.p-note {
  font-size: 13px; color: var(--text-sub); text-align: center;
  border: 1px dashed #d1d5db; background: #f8fafc;
  border-radius: 10px; padding: 11px 10px; line-height: 1.5;
}

/* 加购 PC 席位：与上方套餐卡片同款白色卡片 */
.topup-wrap { max-width: 1320px; margin: 44px auto 16px; padding: 0 20px; }
.topup-bar {
  width: 100%;
  display: flex; align-items: center; justify-content: space-between;
  gap: 24px; flex-wrap: wrap;
  background: #fff;
  border: 1px solid #eef0f4;
  border-radius: 16px;
  padding: 24px 28px;
  color: #111827;
  box-shadow: 0 14px 40px rgba(20,30,90,.10);
  transition: box-shadow .2s, transform .2s;
}
.topup-bar:hover { box-shadow: 0 18px 50px rgba(20,30,90,.14); transform: translateY(-2px); }
.topup-bar + .topup-bar { margin-top: 14px; }
.topup-text { min-width: 220px; flex: 1 1 260px; }
.topup-eyebrow { font-size: 12px; color: var(--brand); font-weight: 700; letter-spacing: .1em; margin-bottom: 4px; }
.topup-name { font-size: 20px; font-weight: 800; color: #111827; letter-spacing: -.01em; }
.topup-sub { font-size: 13px; color: var(--text-sub); margin-top: 6px; line-height: 1.6; }
.topup-price { display: flex; align-items: baseline; gap: 8px; white-space: nowrap; }
.topup-price b { font-size: 34px; font-weight: 800; color: #111827; }
.topup-price span { font-size: 13px; color: var(--text-sub); }
.topup-cta { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; justify-content: flex-end; }
.topup-cta form { margin: 0; }
.topup-cta .btn { border-radius: 10px; padding: 11px 22px; }
.topup-cta .qty-box { display: flex; align-items: center; gap: 8px; }
.topup-cta .qty-label { font-size: 13px; color: var(--text-sub); white-space: nowrap; }
.topup-cta .stepper {
  display: inline-flex; align-items: center;
  border: 1px solid #eef0f4; border-radius: 10px;
  background: #f9fafb; overflow: hidden;
}
.topup-cta .stepper button {
  width: 34px; height: 34px; border: 0; background: transparent;
  color: #111827; font-size: 18px; line-height: 1; cursor: pointer;
}
.topup-cta .stepper button:hover { background: #f3f4f6; }
.topup-cta .stepper input {
  width: 46px; height: 34px; text-align: center; border: 0;
  border-left: 1px solid #eef0f4; border-right: 1px solid #eef0f4;
  background: transparent; color: #111827; font-size: 15px; font-weight: 700;
}
.topup-cta .qty-sub { font-size: 13px; color: var(--text-sub); white-space: nowrap; }

/* 特性 grid / 双栏 */
.cols { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.step-list { counter-reset: step; list-style: none; }
.step-list li { counter-increment: step; position: relative; padding: 0 0 22px 46px; }
.step-list li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute; left: 0; top: 0;
  width: 30px; height: 30px; border-radius: 9px;
  background: #eef2ff; color: var(--brand);
  font-size: 13px; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
}
.step-list li b { display: block; color: #111827; margin-bottom: 4px; }
.step-list li p { color: var(--text-sub); font-size: 13.5px; }

/* 账号中心 */
.acc-wrap { display: grid; grid-template-columns: 200px 1fr; gap: 30px; align-items: start; }
.acc-nav { background: #f8f9fb; border-radius: 14px; padding: 10px; }
.acc-nav a { display: flex; padding: 11px 14px; border-radius: 10px; font-size: 14px; color: #374151; transition: all .15s; }
.acc-nav a:hover { color: var(--brand); }
.acc-nav a.is-active { background: #fff; color: var(--brand); font-weight: 700; box-shadow: 0 2px 10px rgba(20,30,90,.06); }
.stat-row { display: grid; grid-template-columns: repeat(auto-fit,minmax(170px,1fr)); gap: 14px; margin-bottom: 24px; }
.stat { background: #f8f9fb; border-radius: 14px; padding: 16px 18px; }
.stat .k { font-size: 12.5px; color: var(--text-sub); margin-bottom: 6px; }
.stat .v { font-size: 26px; font-weight: 800; color: #111827; }
.stat .v small { font-size: 13px; font-weight: 400; color: var(--text-sub); margin-left: 4px; }
.copied-tip { font-size: 12px; color: #059669; }

/* 文章 */
.article-list a { display: block; padding: 16px 4px; border-bottom: 1px solid #f0f1f4; }
.article-list a:last-child { border-bottom: none; }
.article-list a:hover .at { color: var(--brand); }
.article-list .at { font-size: 15.5px; font-weight: 600; color: #111827; transition: color .15s; }
.article-list .as { font-size: 13px; color: var(--text-sub); margin-top: 5px; line-height: 1.6; }
.article-content { font-size: 15px; line-height: 2; color: #374151; }
.article-content h2 { font-size: 19px; margin: 26px 0 10px; color: #111827; }
.article-content img { border-radius: 10px; margin: 12px 0; }
.article-content ul, .article-content ol { padding-left: 22px; margin: 8px 0; }
.article-content a { color: var(--brand); }

/* 下载空态 / 工具条 */
.empty { text-align: center; padding: 54px 0; color: var(--text-sub); }
.empty .ico { font-size: 30px; margin-bottom: 12px; opacity: .55; }
.toolbar { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-bottom: 16px; flex-wrap: wrap; }
.toolbar .search { display: flex; gap: 8px; }

/* 技术支持页 */
.support-cats {
  display: flex; gap: 10px; flex-wrap: wrap;
  justify-content: center; margin-bottom: 28px;
}
.support-cats__item {
  padding: 8px 18px; border-radius: 999px;
  font-size: 14px; color: #4b5563;
  background: #f8f9fb; border: 1px solid #eef0f4;
  transition: color .15s, border-color .15s, background .15s;
}
.support-cats__item:hover { color: var(--brand); border-color: #dbeafe; }
.support-cats__item.is-active { background: var(--brand); color: #fff; border-color: var(--brand); }

.support-empty {
  text-align: center; padding: 46px 0 56px; color: #6b7280;
}
.support-empty svg {
  width: 56px; height: 56px; color: #9ca3af; margin-bottom: 16px;
}
.support-empty h3 { font-size: 18px; font-weight: 700; color: #111827; margin-bottom: 8px; }
.support-empty p { font-size: 14px; }

.support-intro {
  font-size: 15px; color: #4b5563;
  margin-top: 12px; margin-bottom: 24px;
  line-height: 1.7;
}

.support-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 18px;
}
.support-card {
  background: #f8f9fb; border: 1px solid #eef0f4;
  border-radius: 18px; padding: 26px 22px;
  text-align: center;
  transition: transform .2s, box-shadow .2s;
}
.support-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 34px rgba(20, 30, 90, .08);
}
.support-card svg {
  width: 38px; height: 38px; color: var(--brand); margin-bottom: 14px;
}
.support-card h3 { font-size: 16px; font-weight: 700; color: #111827; margin-bottom: 8px; }
.support-card p { font-size: 13.5px; color: #6b7280; line-height: 1.6; margin-bottom: 18px; }

/* ============================================================
   账号页：登录 / 注册（居中卡片、图标输入、顶部品牌色条）
   ============================================================ */
.auth-page {
  display: flex; align-items: center; justify-content: center;
  min-height: calc(100vh - 160px);
  padding: 110px 5% 60px;
  position: relative; z-index: 1;
}
.auth-card {
  width: 100%; max-width: 380px;
  background: #fff; color: var(--text-main);
  border-radius: 24px;
  padding: 34px 32px 40px;
  box-shadow: 0 30px 80px rgba(2, 8, 46, .34), 0 0 0 1px rgba(255,255,255,.14) inset;
  position: relative; overflow: hidden;
}
.auth-card::before {
  content: "";
  position: absolute; top: 0; left: 0; right: 0; height: 4px;
  background: linear-gradient(90deg, #2563eb, #7c3aed);
}
.auth-card__brand {
  display: flex; align-items: center; justify-content: center; gap: 12px;
  margin-bottom: 26px;
}
.auth-card__brand img { width: 38px; height: 38px; object-fit: contain; }
.auth-card__brand span { font-size: 18px; font-weight: 800; color: #111827; }
.auth-card h1 {
  font-size: 26px; font-weight: 800; text-align: center;
  color: #111827; margin-bottom: 8px; letter-spacing: .01em;
}
.auth-card__lead {
  text-align: center; font-size: 14px; color: var(--text-sub);
  margin-bottom: 28px; line-height: 1.6;
}
.auth-form .field { margin-bottom: 18px; }
.auth-form .field label { display: block; font-size: 13px; font-weight: 600; color: #374151; margin-bottom: 7px; }
.auth-form .required { color: #dc2626; margin-left: 2px; }
.input-wrap { position: relative; }
.input-wrap svg {
  position: absolute; left: 13px; top: 50%; transform: translateY(-50%);
  width: 18px; height: 18px; color: #9ca3af; pointer-events: none;
  transition: color .15s;
}
.input-wrap input[type=text],
.input-wrap input[type=password],
.input-wrap input[type=email],
.input-wrap input[type=tel] {
  width: 100%; padding: 10px 13px 10px 40px;
  font-size: 15px; line-height: 1.4;
  border: 1px solid #e5e7eb; border-radius: 12px;
  background: #fbfbfd; color: #111827;
  transition: border .15s, box-shadow .15s, background .15s; outline: none;
}
.input-wrap input::placeholder { color: #9ca3af; }
.input-wrap input:focus {
  border-color: var(--brand); background: #fff;
  box-shadow: 0 0 0 4px rgba(37,99,235,.12);
}
.input-wrap:focus-within svg { color: var(--brand); }
.btn-auth {
  width: 100%; margin-top: 4px;
  padding: 12px 22px; border-radius: 12px;
  background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
  color: #fff; font-size: 15px; font-weight: 700;
  border: none; cursor: pointer;
  box-shadow: 0 8px 22px rgba(37,99,235,.28);
  transition: transform .15s, box-shadow .15s, background .15s;
}
.btn-auth:hover {
  transform: translateY(-1px);
  background: linear-gradient(135deg, #1d4ed8 0%, #1b4fd1 100%);
  box-shadow: 0 12px 28px rgba(37,99,235,.34);
}
.auth-card__footer {
  text-align: center; margin-top: 22px;
  font-size: 14px; color: var(--text-sub);
}
.auth-card__footer a { color: var(--brand); font-weight: 600; }
.auth-card__footer a:hover { text-decoration: underline; }

/* 响应式 */
@media (max-width: 900px) {
  .plans-grid { grid-template-columns: 1fr; }
  .plans-hero .plan-card { max-width: 480px; width: 100%; }
  .topup-bar { flex-direction: column; align-items: stretch; text-align: center; }
  .topup-text { flex: none; }
  .topup-price { justify-content: center; }
  .topup-cta .btn { width: 100%; }
  .cols { grid-template-columns: 1fr; gap: 24px; }
  .acc-wrap { grid-template-columns: 1fr; }
  .page-body { padding: 26px 20px; width: calc(100% - 24px); border-radius: 16px; }
}

@media (max-width: 760px) {
  .site-header { height: 56px; }
  .brand { font-size: 17px; }
  .brand__mark { width: 28px; height: 28px; }
  .brand__mark img { width: 26px; height: 26px; }
  .nav__links { display: none; }
  .menu-toggle { display: block; }
  .nav.is-open {
    position: fixed; inset: 0; top: 56px;
    background: rgba(255,255,255,.98);
    backdrop-filter: blur(24px);
    flex-direction: column; align-items: center; justify-content: flex-start;
    padding-top: 36px; gap: 20px;
    border-top: 1px solid rgba(0,0,0,.06);
  }
  .nav.is-open .nav__links {
    display: flex; flex-direction: column; align-items: center;
    gap: 16px; font-size: 17px; color: #374151;
  }
  .nav.is-open .nav__user { margin-top: 6px; color: #374151; }
  .hero { padding: 100px 5% 110px; }
  .hero__logo { height: 96px; padding: 0; }
  .hero__logo img { max-height: 70px; }
  .platforms { border-radius: 18px; margin-top: 34px; }
  .platforms__item { padding: 8px 12px; }
  .footer__divider { display: none; }
  .footer__links { gap: 6px 2px; }
  .page-top { padding: 120px 5% 36px; }
}