/* ============================================================
   脉冲波 · maichongbo.com
   设计基调：冷色极简 + 信号感。主色靛蓝，点缀青，波形是品牌符号。
   独立静态站，不依赖任何框架和后端。
   ============================================================ */

/* ---------- 设计令牌 ---------- */
:root {
  --bg: #f6f7fb;
  --bg-2: #eef1f8;
  --card: #ffffff;
  --ink: #14161c;
  --ink-2: #3d4351;
  --ink-3: #565d6d;
  --muted: #6f7686;
  --muted-2: #9aa0ad;
  --line: #e8eaf1;
  --line-2: #eff1f6;

  --brand: #4f46e5;
  --brand-deep: #3b34c9;
  --brand-2: #06b6d4;
  --brand-soft: #eef0ff;
  --brand-line: #dcdfFB;

  --ok: #0ea472;
  --ok-soft: #e7f7f0;
  --warn: #d97706;
  --warn-soft: #fff8ed;

  --r-sm: 12px;
  --r-md: 18px;
  --r-lg: 26px;
  --r-xl: 34px;

  --shadow-1: 0 1px 2px rgba(20, 22, 28, .04), 0 8px 24px -12px rgba(30, 41, 79, .12);
  --shadow-2: 0 2px 6px rgba(20, 22, 28, .04), 0 26px 60px -28px rgba(30, 41, 79, .26);
  --ease: cubic-bezier(.22, 1, .36, 1);

  --font: -apple-system, BlinkMacSystemFont, "SF Pro SC", "PingFang SC",
          "HarmonyOS Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

/* ---------- 基础 ---------- */
*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; cursor: pointer; }
h1, h2, h3, h4 { margin: 0; letter-spacing: -.02em; }
p { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }

.container {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 50px;
  padding: 0 26px;
  border: 1px solid transparent;
  border-radius: 14px;
  font-size: 14.5px;
  font-weight: 600;
  letter-spacing: -.01em;
  white-space: nowrap;
  transition: transform .2s var(--ease), background .2s, border-color .2s, box-shadow .2s, color .2s;
}

.btn:active { transform: translateY(1px); }

.btn-primary {
  background: linear-gradient(135deg, var(--brand) 0%, #6366f1 100%);
  color: #fff;
  box-shadow: 0 10px 26px -12px rgba(79, 70, 229, .7);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--brand-deep) 0%, var(--brand) 100%);
  box-shadow: 0 14px 32px -12px rgba(79, 70, 229, .8);
}

.btn-secondary {
  background: #fff;
  border-color: var(--line);
  color: var(--ink-2);
  box-shadow: var(--shadow-1);
}

.btn-secondary:hover { border-color: #d8dcea; color: var(--ink); }

.btn-ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--muted);
  height: 46px;
}

.btn-ghost:hover { background: #fff; color: var(--ink-2); }

.btn-sm { height: 40px; padding: 0 18px; font-size: 13.5px; border-radius: 12px; }
.btn-wide { width: 100%; }

/* ---------- 顶栏 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(246, 247, 251, .82);
  backdrop-filter: saturate(180%) blur(16px);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  border-bottom: 1px solid transparent;
  transition: border-color .25s, background .25s;
}

.site-header.is-stuck {
  border-bottom-color: var(--line);
  background: rgba(255, 255, 255, .88);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 18px;
  height: 72px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -.03em;
  flex-shrink: 0;
}

.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 11px;
  background: linear-gradient(140deg, var(--brand) 0%, var(--brand-2) 100%);
  display: grid;
  place-items: center;
  box-shadow: 0 6px 16px -8px rgba(79, 70, 229, .8);
}

.brand-mark svg { width: 19px; height: 19px; }

.brand-sub {
  font-size: 11px;
  font-weight: 500;
  color: var(--muted-2);
  letter-spacing: .04em;
  padding-left: 9px;
  margin-left: 2px;
  border-left: 1px solid var(--line);
  align-self: center;
  display: none;
}

.nav-switch {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px;
  box-shadow: var(--shadow-1);
}

.nav-switch a {
  padding: 7px 15px;
  border-radius: 999px;
  font-size: 13.5px;
  font-weight: 550;
  color: var(--muted);
  transition: color .2s, background .2s;
}

.nav-switch a:hover { color: var(--ink); }
.nav-switch a.is-active { background: var(--ink); color: #fff; }

.header-actions { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }

.header-link {
  font-size: 13.5px;
  font-weight: 550;
  color: var(--muted);
  transition: color .2s;
}

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

/* ---------- 首屏 ---------- */
.hero { position: relative; padding: 58px 0 26px; overflow: hidden; }

/* 波形背景：品牌符号。左侧用遮罩淡出，避免干扰正文可读性 */
.hero-wave {
  position: absolute;
  inset: -12% -8% auto -8%;
  height: 640px;
  pointer-events: none;
  opacity: .62;
  z-index: 0;
  -webkit-mask-image: linear-gradient(100deg, transparent 0%, rgba(0, 0, 0, .12) 34%, #000 70%);
  mask-image: linear-gradient(100deg, transparent 0%, rgba(0, 0, 0, .12) 34%, #000 70%);
}

.hero-wave svg { width: 100%; height: 100%; }

.hero-glow {
  position: absolute;
  top: -180px;
  right: -120px;
  width: 620px;
  height: 620px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(6, 182, 212, .16) 0%, rgba(79, 70, 229, .10) 42%, transparent 68%);
  pointer-events: none;
  z-index: 0;
}

.hero .container { position: relative; z-index: 1; }

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
  gap: 46px;
  align-items: start;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  font-weight: 550;
  color: var(--brand);
  background: var(--brand-soft);
  border: 1px solid var(--brand-line);
  padding: 6px 13px;
  border-radius: 999px;
  letter-spacing: .01em;
}

.eyebrow i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--brand-2);
  box-shadow: 0 0 0 3px rgba(6, 182, 212, .18);
}

.hero-title {
  margin-top: 20px;
  font-size: clamp(34px, 5.2vw, 54px);
  line-height: 1.1;
  font-weight: 750;
  letter-spacing: -.045em;
}

.hero-title em {
  font-style: normal;
  background: linear-gradient(115deg, var(--brand) 0%, var(--brand-2) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-lead {
  margin-top: 20px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--muted);
  max-width: 480px;
}

.hero-lead strong { color: var(--ink-2); font-weight: 650; }

.points {
  margin-top: 24px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 11px 18px;
  max-width: 470px;
}

.point {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 13.5px;
  color: var(--ink-2);
  font-weight: 500;
}

.check-dot {
  width: 19px;
  height: 19px;
  border-radius: 50%;
  background: var(--ok-soft);
  color: var(--ok);
  display: grid;
  place-items: center;
  flex-shrink: 0;
}

.check-dot svg { width: 11px; height: 11px; }

.hero-actions {
  margin-top: 30px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.hero-trust {
  margin-top: 16px;
  font-size: 12.5px;
  color: var(--muted-2);
}

.hero-trust b { color: var(--ink-2); font-weight: 650; }

/* ---------- 首屏价格速览卡 ---------- */
.quick-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-2);
  padding: 22px 22px 20px;
  position: relative;
}

.quick-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 3px;
  border-radius: var(--r-lg) var(--r-lg) 0 0;
  background: linear-gradient(90deg, var(--brand) 0%, var(--brand-2) 100%);
}

.quick-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-2);
}

.tag {
  display: inline-flex;
  align-items: center;
  height: 21px;
  padding: 0 8px;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0;
  background: var(--brand-soft);
  color: var(--brand);
  white-space: nowrap;
}

.tag-neutral { background: #f1f3f8; color: var(--muted); }
.tag-ok { background: var(--ok-soft); color: var(--ok); }

.quick-sub {
  margin-top: 8px;
  font-size: 12px;
  color: var(--muted-2);
}

.quick-rows { margin-top: 14px; display: grid; gap: 3px; }

.quick-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 11px 12px;
  border-radius: 13px;
  transition: background .18s;
}

.quick-row:hover { background: #f7f8fc; }

.quick-row.is-pick { background: var(--brand-soft); }
.quick-row.is-pick:hover { background: #e7eaff; }

.quick-name {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--ink);
}

.quick-desc {
  display: block;
  margin-top: 2px;
  font-size: 11.5px;
  color: var(--muted-2);
  font-weight: 400;
}

.quick-price {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -.02em;
  white-space: nowrap;
}

.quick-price span { font-size: 11px; font-weight: 500; color: var(--muted-2); margin-left: 1px; }

.quick-foot {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--line-2);
}

.quick-note {
  margin-top: 11px;
  text-align: center;
  font-size: 11.5px;
  color: var(--muted-2);
}

/* ---------- 实时条 ---------- */
.live { margin-top: 40px; }

.live-card {
  display: flex;
  align-items: center;
  gap: 16px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 13px 18px;
  box-shadow: var(--shadow-1);
  overflow: hidden;
}

.live-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 600;
  color: var(--muted);
  white-space: nowrap;
  flex-shrink: 0;
}

.live-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--ok);
  box-shadow: 0 0 0 3px rgba(14, 164, 114, .16);
  animation: pulse 2.2s infinite;
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 3px rgba(14, 164, 114, .16); }
  50% { box-shadow: 0 0 0 6px rgba(14, 164, 114, .06); }
}

.marquee { overflow: hidden; flex: 1; mask-image: linear-gradient(90deg, transparent, #000 4%, #000 96%, transparent); }
.track { display: flex; gap: 34px; width: max-content; animation: slide 34s linear infinite; }

@keyframes slide {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

.live-item { font-size: 12.5px; color: var(--muted-2); white-space: nowrap; }
.live-item b { color: var(--ink-2); font-weight: 650; }

/* ---------- 区块通用 ---------- */
.section { padding: 76px 0; }
.section-tight { padding: 10px 0; }

.section-head { max-width: 620px; margin-bottom: 34px; }

.section-head h2 {
  margin-top: 14px;
  font-size: clamp(25px, 3.4vw, 34px);
  line-height: 1.24;
  font-weight: 720;
  letter-spacing: -.035em;
}

.section-head p {
  margin-top: 11px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

.center-cta { margin-top: 34px; text-align: center; }
.center-cta .muted { font-size: 13.5px; color: var(--muted); margin-bottom: 15px; }

summary-line, .summary-line {
  margin-top: 30px;
  text-align: center;
  font-size: 13.5px;
  color: var(--muted);
}

.summary-line strong { color: var(--brand); font-weight: 700; }

/* ---------- 平台切换 ---------- */
.platform-tabs {
  display: inline-flex;
  gap: 5px;
  padding: 5px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 999px;
  box-shadow: var(--shadow-1);
  margin-bottom: 28px;
  flex-wrap: wrap;
}

.ptab {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 17px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  font-size: 13.5px;
  font-weight: 560;
  color: var(--muted);
  transition: background .2s, color .2s;
}

.ptab:hover { color: var(--ink); background: #f5f6fa; }

.ptab.is-on {
  background: var(--ink);
  color: #fff;
}

.ptab-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: currentColor;
  opacity: .45;
}

.ptab.is-on .ptab-dot { opacity: 1; background: var(--brand-2); }

/* ---------- 套餐卡片 ---------- */
.plans {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(258px, 1fr));
  gap: 18px;
}

/* 筛选后卡片变少时，收窄并居中，避免卡片挤在左边留一大片空白 */
.plans.is-filtered {
  grid-template-columns: repeat(auto-fit, minmax(258px, 280px));
  justify-content: center;
}

.plan-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 24px 22px 22px;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-1);
  transition: transform .3s var(--ease), box-shadow .3s, border-color .3s;
  position: relative;
}

.plan-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-2);
  border-color: #dde1f0;
}

.plan-card.is-featured {
  border-color: var(--brand-line);
  box-shadow: 0 0 0 1px var(--brand-line), 0 24px 54px -26px rgba(79, 70, 229, .34);
}

.plan-card.is-featured::after {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 3px;
  border-radius: var(--r-lg) var(--r-lg) 0 0;
  background: linear-gradient(90deg, var(--brand) 0%, var(--brand-2) 100%);
}

.plan-card h3 {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 16.5px;
  font-weight: 680;
  letter-spacing: -.025em;
}

.plan-meta {
  margin-top: 5px;
  font-size: 12.5px;
  color: var(--muted-2);
}

.big-price {
  margin-top: 16px;
  display: flex;
  align-items: baseline;
  gap: 2px;
  font-size: 13px;
  font-weight: 600;
  color: var(--muted-2);
}

.big-price em {
  font-style: normal;
  font-size: 34px;
  font-weight: 750;
  letter-spacing: -.04em;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

.big-price small { font-size: 12px; font-weight: 500; color: var(--muted-2); margin-left: 2px; }

.fit {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px dashed var(--line);
  display: grid;
  gap: 8px;
}

.fit li {
  position: relative;
  padding-left: 17px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink-3);
}

.fit li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 8px;
  width: 6px;
  height: 6px;
  border-radius: 2px;
  background: var(--brand-2);
  opacity: .65;
}

.plan-line {
  margin-top: 14px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--muted-2);
}

.plan-card .btn { margin-top: auto; }
.plan-card .fit + .plan-line { margin-bottom: 14px; }
.plan-line + .btn { margin-top: 14px; }

/* ---------- 四宫格流程 ---------- */
.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.g-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 22px 20px;
  box-shadow: var(--shadow-1);
}

.g-num {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--brand);
  background: var(--brand-soft);
  width: 30px;
  height: 30px;
  border-radius: 9px;
  display: grid;
  place-items: center;
  margin-bottom: 14px;
}

.g-card h3 { font-size: 14.5px; font-weight: 650; }

.g-card p {
  margin-top: 7px;
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 保障 ---------- */
.trust-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.trust-item {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 22px 20px;
  box-shadow: var(--shadow-1);
}

.trust-item strong {
  display: block;
  font-size: 15px;
  font-weight: 680;
  letter-spacing: -.02em;
  color: var(--ink);
}

.trust-item span {
  display: block;
  margin-top: 7px;
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 提示条 ---------- */
.note-box {
  display: grid;
  gap: 10px;
  background: var(--warn-soft);
  border: 1px solid #f6e3c4;
  border-radius: var(--r-md);
  padding: 18px 20px;
}

.note-box .note-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 650;
  color: #8a5a12;
}

.note-item {
  display: flex;
  gap: 9px;
  font-size: 12.5px;
  line-height: 1.8;
  color: #8a5a12;
}

.note-item b { font-weight: 700; }

.note-dot {
  flex-shrink: 0;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #f3d9ae;
  color: #8a5a12;
  font-size: 10px;
  font-weight: 700;
  display: grid;
  place-items: center;
  margin-top: 3px;
}

/* ---------- FAQ ---------- */
.faq-shell { display: grid; gap: 10px; }

.faq-item {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
  transition: border-color .2s, box-shadow .2s;
}

.faq-item.open { border-color: var(--brand-line); box-shadow: var(--shadow-1); }

.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 18px 20px;
  background: none;
  border: 0;
  text-align: left;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: -.01em;
  color: var(--ink);
}

.faq-plus {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: #f3f4f9;
  color: var(--muted);
  display: grid;
  place-items: center;
  transition: transform .28s var(--ease), background .2s, color .2s;
}

.faq-plus svg { width: 11px; height: 11px; }
.faq-item.open .faq-plus { transform: rotate(45deg); background: var(--brand); color: #fff; }

.faq-a {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows .32s var(--ease);
}

.faq-item.open .faq-a { grid-template-rows: 1fr; }
.faq-a > div { overflow: hidden; }
.faq-a p {
  padding: 0 20px 19px;
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--muted);
}

/* ---------- 终转化 ---------- */
.final-card {
  position: relative;
  overflow: hidden;
  border-radius: var(--r-xl);
  background: #171a24;
  color: #fff;
  padding: 44px 44px 40px;
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, .75fr);
  gap: 40px;
  align-items: center;
}

.final-card::before {
  content: "";
  position: absolute;
  top: -140px;
  right: -80px;
  width: 460px;
  height: 460px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(6, 182, 212, .22) 0%, rgba(79, 70, 229, .18) 45%, transparent 70%);
}

.final-card > * { position: relative; z-index: 1; }

.final-card h2 { font-size: clamp(25px, 3.2vw, 33px); font-weight: 720; letter-spacing: -.035em; }

.final-card .final-sub {
  margin-top: 11px;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, .62);
}

.final-points {
  margin-top: 22px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.final-point {
  font-size: 12.5px;
  padding: 6px 13px;
  border-radius: 999px;
  background: rgba(255, 255, 255, .08);
  border: 1px solid rgba(255, 255, 255, .1);
  color: rgba(255, 255, 255, .82);
}

.final-note {
  margin-top: 18px;
  font-size: 12px;
  color: rgba(255, 255, 255, .45);
  text-align: center;
}

.final-box {
  background: rgba(255, 255, 255, .06);
  border: 1px solid rgba(255, 255, 255, .1);
  border-radius: var(--r-md);
  padding: 22px;
  backdrop-filter: blur(6px);
}

.final-box .btn-primary { box-shadow: none; }
.final-box .btn-secondary {
  background: rgba(255, 255, 255, .1);
  border-color: rgba(255, 255, 255, .16);
  color: #fff;
  box-shadow: none;
}
.final-box .btn-secondary:hover { background: rgba(255, 255, 255, .16); border-color: rgba(255, 255, 255, .24); color: #fff; }
.final-box .btn + .btn { margin-top: 10px; }

.final-box-title {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 13.5px;
  font-weight: 650;
  margin-bottom: 4px;
}

.final-box ul { margin: 12px 0 18px; display: grid; gap: 7px; }
.final-box li {
  font-size: 12.5px;
  color: rgba(255, 255, 255, .66);
  padding-left: 16px;
  position: relative;
}
.final-box li::before {
  content: "";
  position: absolute;
  left: 2px; top: 8px;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--brand-2);
}

/* ---------- 页脚 ---------- */
.site-footer {
  margin-top: 76px;
  padding: 44px 0 34px;
  border-top: 1px solid var(--line);
  background: #fff;
}

.footer-grid {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 30px;
  flex-wrap: wrap;
}

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -.03em;
}

.footer-sub {
  margin-top: 10px;
  font-size: 12.5px;
  color: var(--muted-2);
}

.footer-links {
  display: flex;
  gap: 22px;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--muted);
}

.footer-links a:hover { color: var(--brand); }

.disclaimer {
  margin-top: 30px;
  padding-top: 22px;
  border-top: 1px solid var(--line-2);
  font-size: 11.5px;
  line-height: 1.9;
  color: var(--muted-2);
}

/* ---------- 移动底栏 ---------- */
.mobile-bar {
  display: none;
  position: fixed;
  left: 0; right: 0; bottom: 0;
  z-index: 70;
  padding: 10px 14px calc(10px + env(safe-area-inset-bottom));
  gap: 8px;
  background: rgba(255, 255, 255, .94);
  backdrop-filter: blur(14px);
  border-top: 1px solid var(--line);
}

.mobile-bar .btn { flex: 1; height: 46px; font-size: 14px; }

/* ---------- 微信弹窗 ---------- */
.modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal.is-open { display: flex; }

.modal-mask {
  position: absolute;
  inset: 0;
  background: rgba(18, 20, 27, .5);
  backdrop-filter: blur(4px);
  animation: fadeIn .22s var(--ease);
}

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.modal-card {
  position: relative;
  width: 100%;
  max-width: 380px;
  background: #fff;
  border-radius: var(--r-lg);
  padding: 28px 26px 24px;
  text-align: center;
  box-shadow: 0 40px 90px -30px rgba(10, 14, 30, .5);
  animation: popIn .3s var(--ease);
}

@keyframes popIn {
  from { opacity: 0; transform: translateY(14px) scale(.97); }
  to { opacity: 1; transform: none; }
}

.modal-close {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 32px;
  height: 32px;
  border: 0;
  border-radius: 50%;
  background: #f3f4f9;
  color: var(--muted);
  font-size: 16px;
  line-height: 1;
  display: grid;
  place-items: center;
  transition: background .2s, color .2s;
}

.modal-close:hover { background: #e9ebf3; color: var(--ink); }

.modal-card h3 { font-size: 18px; font-weight: 700; letter-spacing: -.03em; }

.modal-card .modal-sub {
  margin-top: 7px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--muted);
}

.qr-wrap {
  margin: 20px auto 0;
  width: 190px;
  padding: 10px;
  border-radius: var(--r-md);
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-1);
}

.qr-wrap img { width: 100%; height: auto; border-radius: 10px; }

.wxid-row {
  margin-top: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: #f7f8fc;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 10px 12px;
}

.wxid-label { font-size: 11.5px; color: var(--muted-2); }

.wxid-value {
  font-family: var(--mono);
  font-size: 13.5px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: .02em;
}

.copy-btn {
  border: 0;
  background: var(--brand-soft);
  color: var(--brand);
  font-size: 11.5px;
  font-weight: 600;
  padding: 5px 10px;
  border-radius: 8px;
  transition: background .2s;
}

.copy-btn:hover { background: #e2e6ff; }

.modal-tip {
  margin-top: 14px;
  font-size: 11.5px;
  line-height: 1.7;
  color: var(--muted-2);
}

/* ---------- 滚动出现 ---------- */
/* 默认完全可见：万一 JS 没加载或执行失败，页面照样能看，不会白屏 */
.reveal {
  opacity: 1;
  transform: none;
  transition: opacity .6s var(--ease), transform .6s var(--ease);
  transition-delay: var(--d, 0ms);
}

/* 只有 JS 正常跑起来（html.js-ready）才启用隐藏 → 淡入 */
.js-ready .reveal {
  opacity: 0;
  transform: translateY(16px);
}

.js-ready .reveal.is-in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  .reveal, .js-ready .reveal { opacity: 1; transform: none; transition: none; }
  .track { animation: none; }
  .live-dot { animation: none; }
  html { scroll-behavior: auto; }
}

/* 锚点跳转时给吸顶栏留出空间，避免标题被盖住 */
#top, #plans, #flow, #trust, #faq, #cta { scroll-margin-top: 92px; }

/* ---------- 响应式 ---------- */
@media (max-width: 1020px) {
  .hero-grid { grid-template-columns: 1fr; gap: 34px; }
  /* 单列后波形会压在正文上，压暗一档保证可读性 */
  .hero-wave { opacity: .4; }
  .quick-card { max-width: 520px; }
  .grid-4, .trust-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .final-card { grid-template-columns: 1fr; gap: 28px; padding: 34px 28px; }
  .nav-switch { display: none; }
}

@media (max-width: 760px) {
  .container { padding: 0 18px; }
  .header-inner { height: 64px; }
  .brand { font-size: 16px; }
  .header-link { display: none; }
  .hero { padding: 34px 0 18px; }
  .hero-wave { height: 380px; opacity: .35; }
  .points { grid-template-columns: 1fr; gap: 9px; }
  .section { padding: 54px 0; }
  .plans { grid-template-columns: 1fr; }
  .plans.is-filtered { grid-template-columns: 1fr; justify-content: stretch; }
  .grid-4, .trust-grid { grid-template-columns: 1fr; }
  .quick-card { padding: 20px 18px; }
  .live-card { padding: 11px 14px; gap: 12px; }
  .live-label span:not(.live-dot) { display: none; }
  .mobile-bar { display: flex; }
  body { padding-bottom: 74px; }
  .section-head { margin-bottom: 26px; }
  /* 平台切换：手机上改成横向滑动，避免换行后剩一个孤零零的标签 */
  .platform-tabs {
    width: 100%;
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    justify-content: flex-start;
  }
  .platform-tabs::-webkit-scrollbar { display: none; }
  .ptab { padding: 7px 13px; font-size: 12.5px; flex-shrink: 0; }
  .final-card { padding: 28px 20px; }
  .footer-grid { flex-direction: column; gap: 20px; }
  .footer-links { gap: 16px; font-size: 12.5px; }
  .site-footer { margin-top: 54px; }
}

@media (min-width: 1021px) {
  .brand-sub { display: inline; }
}
/* ---------- 双按钮卡片 / 速览底部（支付宝为主，微信次要） ---------- */
.plan-card .btn + .btn,
.quick-foot .btn + .btn { margin-top: 8px; }
.plan-card .btn-ghost { height: 42px; font-size: 13.5px; }