:root {
  --bg: #fff8f1;
  --paper: #fff;
  --ink: #181818;
  --muted: #6c625d;
  --line: rgba(24, 24, 24, .1);
  --orange: #ff5a13;
  --orange-dark: #d93d07;
  --gold: #ffcd78;
  --teal: #12a98b;
  --blue: #2f61ff;
  --shadow: 0 24px 70px rgba(91, 45, 19, .13);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 15% 0%, rgba(255, 205, 120, .28), transparent 34%),
    radial-gradient(circle at 88% 12%, rgba(47, 97, 255, .12), transparent 26%),
    linear-gradient(180deg, #fff9f2 0%, #fff 42%, #fff7ef 100%);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", Arial, sans-serif;
}

img {
  max-width: 100%;
  display: block;
}

button,
a {
  font: inherit;
}

button {
  cursor: pointer;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 0 clamp(18px, 4vw, 56px);
  background: rgba(255, 250, 245, .88);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
}

.brand,
.nav a {
  color: var(--ink);
  text-decoration: none;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 950;
  font-size: 20px;
}

.brand-mark {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  color: #fff;
  background: linear-gradient(135deg, var(--orange), #111);
  border-radius: 8px;
  font-family: Georgia, "Times New Roman", serif;
}

.nav {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 15px;
  font-weight: 800;
}

.nav a.nav-kyc {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 0 12px;
  color: #fff;
  background: linear-gradient(135deg, #1f45d8, #111827);
  border-radius: 8px;
  box-shadow: 0 10px 24px rgba(31, 69, 216, .22);
  white-space: nowrap;
}

.nav-contact {
  border: 0;
  color: #fff;
  background: #111;
  border-radius: 8px;
  padding: 10px 16px;
  font-weight: 900;
}

.hero {
  min-height: calc(100vh - 72px);
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 520px);
  align-items: center;
  gap: clamp(28px, 5vw, 72px);
  padding: clamp(34px, 6vw, 70px) clamp(18px, 5vw, 72px);
}

.hero-copy {
  max-width: 780px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--orange-dark);
  font-size: 15px;
  font-weight: 950;
  letter-spacing: 0;
}

.eyebrow::before {
  content: "";
  width: 26px;
  height: 3px;
  background: currentColor;
  border-radius: 99px;
}

h1,
h2,
h3,
p {
  margin: 0;
}

h1 {
  margin-top: 18px;
  font-size: clamp(48px, 7vw, 92px);
  line-height: .96;
  letter-spacing: 0;
  max-width: 820px;
}

.hero p {
  margin-top: 24px;
  max-width: 700px;
  color: var(--muted);
  font-size: clamp(17px, 1.7vw, 22px);
  line-height: 1.8;
  font-weight: 700;
}

.hero-actions,
.cta {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.hero-actions {
  margin-top: 32px;
}

.hero-service-ad {
  display: grid;
  gap: 10px;
  margin-top: 22px;
  max-width: 680px;
  padding: 16px;
  border: 1px solid rgba(255, 90, 19, .2);
  border-radius: 8px;
  background: rgba(255, 255, 255, .78);
  box-shadow: 0 14px 36px rgba(91, 45, 19, .1);
}

.hero-service-ad strong {
  font-size: 18px;
  line-height: 1.35;
  font-weight: 950;
}

.hero-service-ad span {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.65;
  font-weight: 700;
}

.hero-service-ad div {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.hero-service-ad a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 0 14px;
  border-radius: 8px;
  color: #fff;
  background: #17110d;
  text-decoration: none;
  font-size: 14px;
  font-weight: 900;
}

.hero-service-ad a + a {
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--line);
}

.primary,
.secondary,
.product button {
  min-height: 48px;
  border-radius: 8px;
  padding: 13px 20px;
  border: 0;
  font-weight: 950;
  text-decoration: none;
}

.primary,
.product button {
  color: #fff;
  background: linear-gradient(135deg, var(--orange), var(--orange-dark));
  box-shadow: 0 16px 34px rgba(255, 90, 19, .24);
}

.secondary {
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--line);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 40px;
  max-width: 620px;
}

.hero-stats div {
  padding: 18px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,.72);
  border-radius: 8px;
}

.hero-stats strong,
.hero-stats span {
  display: block;
}

.hero-stats strong {
  font-size: 30px;
  color: var(--orange);
  font-weight: 950;
}

.hero-stats span {
  margin-top: 4px;
  color: var(--muted);
  font-weight: 800;
}

.hero-media {
  position: relative;
}

.hero-media img {
  width: min(100%, 520px);
  margin-inline: auto;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.guide-strip {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 24px;
  margin: 0 clamp(18px, 5vw, 72px) 24px;
  padding: clamp(22px, 3vw, 34px);
  border: 1px solid rgba(255, 90, 19, .22);
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(255, 90, 19, .12), rgba(255, 205, 120, .18)),
    rgba(255, 255, 255, .82);
  box-shadow: var(--shadow);
}

.guide-strip .eyebrow {
  font-size: 14px;
}

.guide-strip h2 {
  margin-top: 10px;
  font-size: clamp(28px, 4vw, 48px);
  line-height: 1.08;
  letter-spacing: 0;
}

.guide-strip p {
  max-width: 760px;
  margin-top: 12px;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.75;
  font-weight: 800;
}

.guide-strip-actions {
  display: grid;
  justify-items: end;
  gap: 10px;
  min-width: 210px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 900;
  white-space: nowrap;
}

.guide-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  border-radius: 8px;
  padding: 0 20px;
  color: #fff;
  background: #111;
  text-decoration: none;
  font-weight: 950;
}

.notice-band {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin: 0 clamp(18px, 5vw, 72px);
  border-radius: 8px;
  overflow: hidden;
  background: var(--line);
  box-shadow: var(--shadow);
}

.notice-band span {
  min-height: 66px;
  display: grid;
  place-items: center;
  padding: 16px;
  background: #111;
  color: #fff2d9;
  font-weight: 900;
  text-align: center;
}

.builder-entry {
  display: grid;
  grid-template-columns: minmax(0, .95fr) minmax(420px, 1.05fr);
  gap: 18px;
  align-items: stretch;
  margin: 18px clamp(18px, 5vw, 72px) 0;
  padding: 22px;
  border: 1px solid rgba(255, 90, 19, .22);
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(255, 205, 120, .34), rgba(18, 169, 139, .12)),
    rgba(255, 255, 255, .9);
  box-shadow: var(--shadow);
}

.builder-entry-copy h2 {
  margin: 8px 0 0;
  font-size: clamp(26px, 3.2vw, 42px);
  line-height: 1.12;
}

.builder-entry-copy p {
  margin: 14px 0 0;
  max-width: 720px;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.75;
  font-weight: 700;
}

.builder-entry-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.builder-entry-card {
  min-height: 166px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 12px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  text-decoration: none;
  background: rgba(255, 255, 255, .86);
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}

.builder-entry-card:hover {
  transform: translateY(-2px);
  border-color: rgba(255, 90, 19, .36);
  box-shadow: 0 18px 42px rgba(91, 45, 19, .14);
}

.builder-entry-card.primary {
  color: #fff;
  border-color: #17110d;
  background: #17110d;
}

.builder-entry-card span {
  color: var(--orange-dark);
  font-size: 12px;
  font-weight: 950;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.builder-entry-card.primary span {
  color: var(--gold);
}

.builder-entry-card strong {
  display: block;
  font-size: 20px;
  line-height: 1.35;
}

.builder-entry-card small {
  color: var(--muted);
  line-height: 1.65;
  font-weight: 700;
}

.builder-entry-card.primary small {
  color: rgba(255, 255, 255, .76);
}

.section {
  padding: clamp(54px, 7vw, 96px) clamp(18px, 5vw, 72px);
}

.section-head {
  max-width: 820px;
  margin-bottom: 30px;
}

.section h2,
.cta h2 {
  margin-top: 12px;
  font-size: clamp(34px, 5vw, 60px);
  line-height: 1.05;
  letter-spacing: 0;
}

.section-head p {
  margin-top: 16px;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.75;
  font-weight: 700;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.product {
  overflow: hidden;
  border: 1px solid var(--line);
  background: rgba(255,255,255,.84);
  border-radius: 8px;
  box-shadow: 0 18px 46px rgba(65, 34, 16, .08);
}

.product img {
  aspect-ratio: 4 / 5;
  width: 100%;
  object-fit: cover;
}

.product-body {
  padding: 18px;
}

.product-title {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
}

.product-title h3 {
  font-size: 22px;
  line-height: 1.2;
}

.product-title span {
  flex: 0 0 auto;
  padding: 5px 8px;
  color: #fff;
  background: #111;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 950;
}

.product p {
  margin-top: 12px;
  min-height: 86px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.65;
  font-weight: 700;
}

.price-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin: 16px 0;
}

.price-row b {
  padding: 8px 10px;
  color: var(--orange-dark);
  background: #fff3e8;
  border: 1px solid rgba(255,90,19,.18);
  border-radius: 6px;
  font-size: 15px;
  white-space: nowrap;
}

.claude-note {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 4px 0 16px;
}

.claude-note div {
  padding: 12px;
  border: 1px solid rgba(239, 91, 22, .18);
  border-radius: 8px;
  background: linear-gradient(135deg, rgba(255, 247, 237, .92), rgba(255, 255, 255, .96));
}

.claude-note strong {
  display: block;
  color: #111827;
  font-size: 14px;
}

.claude-note span {
  display: inline-flex;
  margin: 7px 0;
  padding: 4px 8px;
  border-radius: 999px;
  background: var(--orange);
  color: #fff;
  font-size: 13px;
  font-weight: 900;
}

.claude-note p {
  min-height: 0;
  margin: 0;
  color: #4b5563;
  font-size: 12px;
  font-weight: 700;
  line-height: 1.65;
}

.product button {
  width: 100%;
}

.account-support {
  background:
    radial-gradient(circle at 18% 20%, rgba(255, 90, 19, .1), transparent 28%),
    radial-gradient(circle at 86% 12%, rgba(47, 97, 255, .12), transparent 30%),
    linear-gradient(180deg, #fff, #fff7ef);
}

.support-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.support-grid article {
  min-height: 260px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 18px;
  padding: 26px;
  color: #fff;
  background:
    linear-gradient(145deg, rgba(255, 90, 19, .88), rgba(18, 18, 18, .95)),
    #111;
  border-radius: 8px;
  box-shadow: 0 20px 52px rgba(65, 34, 16, .14);
}

.support-grid article:nth-child(2) {
  background:
    linear-gradient(145deg, rgba(47, 97, 255, .9), rgba(18, 18, 18, .96)),
    #111;
}

.support-grid article:nth-child(3) {
  background:
    linear-gradient(145deg, rgba(18, 169, 139, .9), rgba(18, 18, 18, .96)),
    #111;
}

.support-grid span {
  width: fit-content;
  padding: 7px 10px;
  color: #111;
  background: #fff;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 950;
}

.support-grid h3 {
  margin-top: auto;
  font-size: clamp(24px, 3vw, 34px);
  line-height: 1.08;
}

.support-grid p {
  color: rgba(255, 250, 245, .88);
  font-size: 16px;
  line-height: 1.75;
  font-weight: 750;
}

.support-cta {
  margin-top: 24px;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, .9fr) minmax(320px, 500px);
  gap: clamp(28px, 5vw, 72px);
  align-items: center;
  background: #111;
  color: #fff;
}

.split p {
  margin-top: 18px;
  color: #f5dec8;
  font-size: 19px;
  line-height: 1.85;
  font-weight: 750;
}

.split img {
  border-radius: 8px;
  box-shadow: 0 26px 70px rgba(0,0,0,.35);
}

.feature-list {
  display: grid;
  gap: 14px;
  padding: 0;
  margin: 26px 0 28px;
  list-style: none;
}

.feature-list li {
  padding-left: 30px;
  position: relative;
  color: #fff7ec;
  font-size: 17px;
  line-height: 1.65;
  font-weight: 800;
}

.feature-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 2px;
  color: var(--gold);
  font-weight: 950;
}

.process {
  background: linear-gradient(180deg, #fff, #fff7ef);
}

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

.steps div {
  padding: 24px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 16px 40px rgba(65, 34, 16, .06);
}

.steps strong {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  color: #fff;
  background: var(--orange);
  border-radius: 8px;
  font-size: 22px;
}

.steps h3 {
  margin-top: 18px;
  font-size: 23px;
}

.steps p {
  margin-top: 10px;
  color: var(--muted);
  line-height: 1.65;
  font-weight: 700;
}

.seo-section {
  background: #fff;
}

.seo-grid,
.faq-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.seo-grid article,
.faq-grid article {
  min-height: 100%;
  padding: 24px;
  background: #fffaf5;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 14px 36px rgba(65, 34, 16, .06);
}

.seo-grid h3,
.faq-grid h3 {
  font-size: 22px;
  line-height: 1.25;
}

.seo-grid p,
.faq-grid p {
  margin-top: 12px;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.75;
  font-weight: 700;
}

.keyword-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.seo-linkline {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.seo-linkline a {
  padding: 9px 12px;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 6px;
  font-size: 14px;
  font-weight: 950;
  text-decoration: none;
}

.seo-grid a {
  color: var(--orange-dark);
  text-underline-offset: 3px;
}

.source-note {
  margin-top: 18px;
  padding: 16px 18px;
  border-left: 4px solid var(--orange);
  background: #fff7ef;
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.75;
}

.topic-page .hero {
  min-height: 0;
}

.topic-page .section-head {
  max-width: 920px;
}

.contact-mini {
  display: grid;
  gap: 10px;
  margin-top: 20px;
  padding: 18px;
  background: #111;
  color: #fff7ec;
  border-radius: 8px;
}

.contact-mini strong {
  color: var(--gold);
  font-size: 24px;
  word-break: break-all;
}

.keyword-strip span {
  padding: 9px 12px;
  color: var(--orange-dark);
  background: #fff3e8;
  border: 1px solid rgba(255,90,19,.18);
  border-radius: 6px;
  font-size: 14px;
  font-weight: 950;
}

.faq-section {
  background: linear-gradient(180deg, #fff7ef, #fff);
}

.faq-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.cta {
  margin: clamp(30px, 5vw, 64px) clamp(18px, 5vw, 72px);
  padding: clamp(28px, 4vw, 48px);
  justify-content: space-between;
  background:
    radial-gradient(circle at 78% 15%, rgba(255, 205, 120, .34), transparent 30%),
    linear-gradient(135deg, #1a1a1a, #332015);
  color: #fff;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.footer {
  display: flex;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
  padding: 26px;
  color: var(--muted);
  font-weight: 800;
  border-top: 1px solid var(--line);
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: none;
  place-items: center;
  padding: 20px;
}

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

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,.62);
}

.modal-panel {
  position: relative;
  width: min(100%, 560px);
  max-height: calc(100vh - 40px);
  overflow: auto;
  padding: 34px;
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 30px 90px rgba(0,0,0,.32);
}

.modal-close {
  position: absolute;
  right: 14px;
  top: 14px;
  width: 38px;
  height: 38px;
  border: 0;
  border-radius: 8px;
  background: #f1eee9;
  color: #111;
  font-size: 28px;
  line-height: 1;
}

.modal-panel h2 {
  margin-top: 12px;
  font-size: clamp(34px, 7vw, 52px);
  color: var(--orange-dark);
  letter-spacing: 0;
}

.modal-panel p {
  margin-top: 14px;
  color: var(--muted);
  line-height: 1.8;
  font-weight: 700;
}

.contact-methods {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 18px;
  align-items: stretch;
  margin-top: 20px;
}

.qr-card,
.wechat-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fffaf5;
}

.qr-card {
  padding: 12px;
  text-align: center;
}

.qr-card img {
  width: 100%;
  border-radius: 6px;
  background: #fff;
}

.qr-card span,
.wechat-card span {
  display: block;
  color: var(--muted);
  font-size: 14px;
  font-weight: 900;
}

.qr-card span {
  margin-top: 8px;
}

.wechat-card {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 18px;
}

.wechat-card strong {
  display: block;
  margin-top: 8px;
  color: var(--orange-dark);
  font-size: 23px;
  line-height: 1.15;
  word-break: break-all;
}

.copy-btn {
  width: 100%;
  margin-top: 18px;
}

.qr-open-link {
  display: inline-flex;
  justify-content: center;
  margin-top: 12px;
  color: var(--orange-dark);
  font-size: 14px;
  font-weight: 900;
  text-decoration: none;
}

.qr-open-link:hover {
  text-decoration: underline;
}

.copy-state {
  display: block;
  min-height: 24px;
  margin-top: 12px;
  color: var(--teal);
  font-weight: 900;
  text-align: center;
}

@media (max-width: 1100px) {
  .product-grid,
  .support-grid,
  .steps,
  .seo-grid,
  .faq-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hero {
    grid-template-columns: 1fr;
  }

  .builder-entry {
    grid-template-columns: 1fr;
  }

  .hero-media img {
    width: min(100%, 460px);
  }
}

@media (max-width: 760px) {
  .site-header {
    height: auto;
    padding-block: 12px;
    align-items: flex-start;
  }

  .nav {
    justify-content: flex-end;
    gap: 10px;
    flex-wrap: wrap;
    font-size: 13px;
  }

  .hero {
    min-height: 0;
  }

  .hero-stats,
  .guide-strip,
  .notice-band,
  .builder-entry-grid,
  .product-grid,
  .support-grid,
  .split,
  .steps,
  .seo-grid,
  .faq-grid {
    grid-template-columns: 1fr;
  }

  .guide-strip-actions {
    justify-items: start;
    min-width: 0;
    white-space: normal;
  }

  .product p {
    min-height: 0;
  }

  .claude-note {
    grid-template-columns: 1fr;
  }

  .cta {
    align-items: flex-start;
  }

  .footer {
    justify-content: flex-start;
  }
}

@media (max-width: 520px) {
  .brand {
    font-size: 16px;
  }

  .brand-mark {
    width: 34px;
    height: 34px;
  }

  .nav a {
    display: none;
  }

  .nav a.nav-kyc {
    display: inline-flex;
    min-height: 36px;
    padding: 0 10px;
    font-size: 13px;
  }

  .hero-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .hero-service-ad a {
    width: 100%;
  }

  .primary,
  .secondary,
  .guide-link {
    width: 100%;
    text-align: center;
  }

  .hero-stats div,
  .builder-entry,
  .steps div,
  .modal-panel {
    padding: 20px;
  }

  .builder-entry-card {
    min-height: auto;
  }

  .contact-methods {
    grid-template-columns: 1fr;
  }

  .qr-card img {
    width: min(100%, 280px);
    margin-inline: auto;
  }
}