:root {
  --ink: #17151c;
  --ink-soft: #292631;
  --paper: #f5f2e9;
  --white: #fffefa;
  --purple: #5b356d;
  --purple-dark: #3d244a;
  --gold: #d6ad55;
  --coral: #e85f4d;
  --green: #2d8a70;
  --line: #d8d1c4;
  --muted: #6f6a72;
  --shadow: 0 18px 45px rgba(23, 21, 28, 0.12);
  --radius: 6px;
  --content: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  line-height: 1.75;
  letter-spacing: 0;
}

body.menu-open {
  overflow: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

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

button,
a {
  -webkit-tap-highlight-color: transparent;
}

.skip-link {
  position: fixed;
  top: 8px;
  left: -999px;
  z-index: 1000;
  padding: 8px 12px;
  background: var(--white);
  color: var(--ink);
}

.skip-link:focus {
  left: 8px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(23, 21, 28, 0.96);
  color: var(--white);
  backdrop-filter: blur(12px);
}

.header-inner {
  width: min(calc(100% - 40px), var(--content));
  min-height: 72px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  flex: 0 0 auto;
  font-weight: 800;
  font-size: 19px;
}

.brand img {
  width: 40px;
  height: 40px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 15px;
}

.site-nav a:not(.button) {
  position: relative;
  color: rgba(255, 255, 255, 0.78);
}

.site-nav a:not(.button)::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -10px;
  left: 0;
  height: 2px;
  background: var(--gold);
  transform: scaleX(0);
  transition: transform 180ms ease;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: #fff;
}

.site-nav a:hover::after,
.site-nav a[aria-current="page"]::after {
  transform: scaleX(1);
}

.menu-button {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 4px;
  background: transparent;
  color: #fff;
  cursor: pointer;
}

.menu-button span,
.menu-button::before,
.menu-button::after {
  content: "";
  display: block;
  width: 20px;
  height: 2px;
  margin: 5px auto;
  background: currentColor;
}

.button {
  min-height: 48px;
  padding: 0 22px;
  border: 0;
  border-radius: 4px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  background: var(--coral);
  color: #fff;
  font-weight: 800;
  box-shadow: 4px 4px 0 var(--ink);
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.button:hover {
  transform: translate(-2px, -2px);
  box-shadow: 7px 7px 0 var(--ink);
}

.button-small {
  min-height: 40px;
  padding: 0 18px;
  box-shadow: 3px 3px 0 var(--gold);
}

.button-small:hover {
  box-shadow: 5px 5px 0 var(--gold);
}

.button-light {
  background: var(--gold);
  color: var(--ink);
}

.icon-arrow {
  font-size: 20px;
  line-height: 1;
}

.hero {
  position: relative;
  overflow: hidden;
  min-height: 670px;
  background: var(--ink);
  color: var(--white);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.18;
  background-image: linear-gradient(rgba(255, 255, 255, 0.17) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.17) 1px, transparent 1px);
  background-size: 38px 38px;
  mask-image: linear-gradient(to right, transparent, #000 45%, #000);
}

.hero-inner {
  position: relative;
  width: min(calc(100% - 40px), var(--content));
  min-height: 670px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 520px);
  align-items: center;
  gap: 62px;
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--gold);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0;
}

.hero h1 {
  max-width: 650px;
  margin: 0;
  font-size: clamp(42px, 5.4vw, 68px);
  line-height: 1.08;
  letter-spacing: 0;
}

.hero-copy {
  max-width: 610px;
  margin: 24px 0 0;
  color: rgba(255, 255, 255, 0.74);
  font-size: 18px;
}

.hero-actions {
  margin-top: 30px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px;
}

.file-note {
  color: rgba(255, 255, 255, 0.62);
  font-size: 13px;
}

.hero-visual {
  position: relative;
  min-height: 560px;
}

.hero-visual::before,
.hero-visual::after {
  content: "";
  position: absolute;
  border: 2px solid var(--gold);
  background: var(--purple-dark);
}

.hero-visual::before {
  top: 52px;
  right: 30px;
  width: 72%;
  height: 76%;
  transform: rotate(5deg);
}

.hero-visual::after {
  right: 0;
  bottom: 48px;
  width: 165px;
  height: 105px;
  border-color: var(--coral);
  background: transparent;
}

.phone-shot {
  position: absolute;
  z-index: 2;
  top: 18px;
  left: 50%;
  width: min(72vw, 300px);
  max-width: 400px;
  height: auto;
  transform: translateX(-58%) rotate(-3deg);
  filter: drop-shadow(0 28px 38px rgba(0, 0, 0, 0.45));
}

.trust-strip {
  position: relative;
  z-index: 4;
  margin-top: -40px;
}

.trust-inner {
  width: min(calc(100% - 40px), var(--content));
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 2px solid var(--ink);
  background: var(--white);
  box-shadow: 8px 8px 0 var(--gold);
}

.trust-item {
  min-height: 105px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.trust-item + .trust-item {
  border-left: 1px solid var(--line);
}

.trust-item strong {
  font-size: 25px;
  line-height: 1.2;
}

.trust-item span {
  margin-top: 5px;
  color: var(--muted);
  font-size: 13px;
}

.section {
  padding: 96px 0;
}

.section-white {
  background: var(--white);
}

.section-dark {
  background: var(--ink);
  color: var(--white);
}

.container {
  width: min(calc(100% - 40px), var(--content));
  margin: 0 auto;
}

.section-head {
  margin-bottom: 42px;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
}

.section-head h2 {
  margin: 0;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.15;
  letter-spacing: 0;
}

.kicker {
  display: block;
  margin-bottom: 9px;
  color: var(--coral);
  font-size: 13px;
  font-weight: 800;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-bottom: 2px solid var(--coral);
  font-weight: 800;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 2px solid var(--ink);
  border-left: 2px solid var(--ink);
}

.feature-item {
  min-height: 260px;
  padding: 30px;
  border-right: 2px solid var(--ink);
  border-bottom: 2px solid var(--ink);
  background: var(--white);
}

.feature-number {
  width: 44px;
  height: 44px;
  margin-bottom: 38px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--purple);
  color: #fff;
  font-weight: 900;
}

.feature-item:nth-child(2) .feature-number,
.feature-item:nth-child(5) .feature-number {
  background: var(--gold);
  color: var(--ink);
}

.feature-item:nth-child(3) .feature-number,
.feature-item:nth-child(6) .feature-number {
  background: var(--coral);
}

.feature-item h3 {
  margin: 0 0 10px;
  font-size: 21px;
}

.feature-item p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

.shot-rail {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(240px, 300px);
  gap: 24px;
  overflow-x: auto;
  overscroll-behavior-inline: contain;
  scroll-snap-type: inline mandatory;
  scrollbar-color: var(--gold) var(--ink-soft);
  padding: 8px 2px 24px;
}

.shot-card {
  scroll-snap-align: start;
}

.shot-card img {
  width: 100%;
  max-width: 400px;
  height: auto;
  border: 2px solid rgba(255, 255, 255, 0.25);
  background: var(--ink-soft);
}

.shot-card h3 {
  margin: 16px 0 4px;
  font-size: 18px;
}

.shot-card p {
  margin: 0;
  color: rgba(255, 255, 255, 0.62);
  font-size: 14px;
}

.path-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.path-card {
  position: relative;
  min-height: 320px;
  padding: 40px;
  border: 2px solid var(--ink);
  overflow: hidden;
  background: var(--white);
}

.path-card::after {
  content: attr(data-mark);
  position: absolute;
  right: 18px;
  bottom: -32px;
  color: rgba(91, 53, 109, 0.1);
  font-size: 128px;
  font-weight: 900;
}

.path-card:nth-child(2) {
  background: var(--gold);
}

.path-card h3 {
  max-width: 360px;
  margin: 0 0 18px;
  font-size: 30px;
  line-height: 1.25;
}

.path-card ul {
  margin: 0 0 28px;
  padding: 0;
  list-style: none;
}

.path-card li {
  margin: 8px 0;
}

.path-card li::before {
  content: "◆";
  margin-right: 9px;
  color: var(--coral);
  font-size: 10px;
}

.reviews-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.9fr 0.9fr;
  gap: 20px;
}

.review {
  min-height: 235px;
  margin: 0;
  padding: 30px;
  border-left: 5px solid var(--purple);
  background: #eee8f0;
}

.review:nth-child(2) {
  border-color: var(--gold);
  background: #f4ecd9;
}

.review:nth-child(3) {
  border-color: var(--coral);
  background: #f7e2de;
}

.review blockquote {
  margin: 0 0 20px;
  font-size: 17px;
}

.review figcaption {
  color: var(--muted);
  font-size: 14px;
}

.faq-preview {
  max-width: 900px;
  margin: 0 auto;
  border-top: 2px solid var(--ink);
}

.faq-item {
  border-bottom: 1px solid var(--line);
}

.faq-question {
  width: 100%;
  min-height: 78px;
  padding: 18px 50px 18px 0;
  border: 0;
  position: relative;
  background: transparent;
  color: var(--ink);
  font: inherit;
  font-size: 18px;
  font-weight: 800;
  text-align: left;
  cursor: pointer;
}

.faq-question::after {
  content: "+";
  position: absolute;
  right: 5px;
  top: 50%;
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border: 1px solid var(--ink);
  transform: translateY(-50%);
  font-size: 24px;
  line-height: 1;
}

.faq-question[aria-expanded="true"]::after {
  content: "−";
  background: var(--ink);
  color: #fff;
}

.faq-answer {
  display: none;
  max-width: 780px;
  padding: 0 0 25px;
  color: var(--muted);
}

.faq-answer p {
  margin: 0;
}

.faq-item.is-open .faq-answer {
  display: block;
}

.download-band {
  padding: 70px 0;
  background: var(--purple);
  color: #fff;
}

.download-band .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 35px;
}

.download-band h2 {
  margin: 0 0 8px;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.18;
}

.download-band p {
  margin: 0;
  color: rgba(255, 255, 255, 0.72);
}

.site-footer {
  padding: 54px 0 26px;
  background: var(--ink);
  color: rgba(255, 255, 255, 0.68);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 60px;
}

.footer-brand {
  color: #fff;
}

.footer-brand p {
  max-width: 500px;
  margin: 18px 0 0;
}

.footer-links strong {
  display: block;
  margin-bottom: 12px;
  color: #fff;
}

.footer-links a {
  display: block;
  margin: 7px 0;
}

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

.disclaimer {
  margin: 34px 0 0;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.13);
  font-size: 13px;
}

.copyright {
  margin-top: 10px;
  font-size: 13px;
}

.page-hero {
  position: relative;
  overflow: hidden;
  padding: 95px 0 75px;
  background: var(--ink);
  color: #fff;
}

.page-hero::after {
  content: attr(data-label);
  position: absolute;
  right: 4vw;
  bottom: -35px;
  color: rgba(255, 255, 255, 0.055);
  font-size: clamp(100px, 18vw, 250px);
  font-weight: 900;
  line-height: 1;
}

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

.breadcrumbs {
  margin: 0 0 18px;
  color: rgba(255, 255, 255, 0.56);
  font-size: 14px;
}

.breadcrumbs a:hover {
  color: var(--gold);
}

.page-hero h1 {
  max-width: 780px;
  margin: 0;
  font-size: clamp(39px, 6vw, 70px);
  line-height: 1.1;
  letter-spacing: 0;
}

.page-hero .lead {
  max-width: 720px;
  margin: 22px 0 0;
  color: rgba(255, 255, 255, 0.7);
  font-size: 18px;
}

.content-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 290px;
  align-items: start;
  gap: 65px;
}

.article section {
  margin-bottom: 65px;
  scroll-margin-top: 100px;
}

.article h2 {
  margin: 0 0 24px;
  padding-bottom: 14px;
  border-bottom: 2px solid var(--ink);
  font-size: 30px;
  line-height: 1.25;
}

.article h3 {
  margin: 28px 0 10px;
  font-size: 21px;
}

.article p {
  margin: 0 0 18px;
  color: #46414a;
}

.article a:not(.button) {
  color: var(--purple);
  border-bottom: 1px solid var(--purple);
  font-weight: 700;
}

.step-list {
  counter-reset: steps;
  display: grid;
  gap: 20px;
}

.step {
  counter-increment: steps;
  padding: 28px 28px 28px 92px;
  position: relative;
  border: 1px solid var(--line);
  background: var(--white);
}

.step::before {
  content: counter(steps, decimal-leading-zero);
  position: absolute;
  top: 25px;
  left: 26px;
  color: var(--coral);
  font-size: 26px;
  font-weight: 900;
}

.step h3 {
  margin-top: 0;
}

.step p:last-child {
  margin-bottom: 0;
}

.callout {
  margin: 28px 0;
  padding: 24px 26px;
  border-left: 5px solid var(--gold);
  background: #f1ead9;
}

.callout strong {
  display: block;
  margin-bottom: 7px;
}

.callout p:last-child {
  margin-bottom: 0;
}

.check-list {
  padding: 0;
  list-style: none;
}

.check-list li {
  margin: 12px 0;
  padding-left: 30px;
  position: relative;
}

.check-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 1px;
  width: 21px;
  height: 21px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--green);
  color: #fff;
  font-size: 12px;
  font-weight: 900;
}

.article-figure {
  margin: 28px 0;
  padding: 24px;
  display: grid;
  grid-template-columns: minmax(180px, 300px) 1fr;
  align-items: center;
  gap: 34px;
  border: 2px solid var(--ink);
  background: var(--white);
}

.article-figure img {
  width: 100%;
  max-width: 400px;
  height: auto;
}

.article-figure figcaption {
  color: var(--muted);
}

.article-figure strong {
  display: block;
  margin-bottom: 8px;
  color: var(--ink);
  font-size: 20px;
}

.toc {
  position: sticky;
  top: 100px;
  padding: 24px;
  border-top: 5px solid var(--purple);
  background: var(--white);
  box-shadow: var(--shadow);
}

.toc strong {
  display: block;
  margin-bottom: 12px;
}

.toc a {
  display: block;
  padding: 8px 0;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

.toc a:hover {
  color: var(--purple);
}

.info-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--white);
}

.info-table th,
.info-table td {
  padding: 15px 18px;
  border: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.info-table th {
  width: 29%;
  background: #ede7f0;
}

.feature-detail-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.feature-detail {
  min-height: 220px;
  padding: 26px;
  border: 1px solid var(--line);
  background: var(--white);
}

.feature-detail h3 {
  margin-top: 0;
}

.feature-detail p:last-child {
  margin-bottom: 0;
}

.faq-list-large .faq-question {
  min-height: 84px;
  font-size: 19px;
}

.faq-list-large .faq-answer {
  max-width: none;
}

.related {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.related a {
  min-height: 130px;
  padding: 24px;
  border: 2px solid var(--ink) !important;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background: var(--white);
  color: var(--ink) !important;
}

.related a:hover {
  background: var(--gold);
}

.related span {
  color: var(--coral);
  font-weight: 900;
}

@media (max-width: 900px) {
  .menu-button {
    display: block;
  }

  .site-nav {
    position: fixed;
    top: 72px;
    right: 0;
    bottom: 0;
    left: 0;
    padding: 35px 20px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--ink);
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a:not(.button) {
    padding: 16px 4px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  }

  .site-nav a::after {
    display: none;
  }

  .site-nav .button {
    margin-top: 24px;
  }

  .hero-inner {
    grid-template-columns: 1fr;
    gap: 10px;
    padding: 80px 0 95px;
  }

  .hero-visual {
    min-height: 480px;
  }

  .phone-shot {
    left: 46%;
  }

  .trust-inner,
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .trust-item:nth-child(3) {
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  .trust-item:nth-child(4) {
    border-top: 1px solid var(--line);
  }

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

  .content-layout {
    grid-template-columns: 1fr;
  }

  .toc {
    position: static;
    order: -1;
  }
}

@media (max-width: 650px) {
  .header-inner,
  .container,
  .hero-inner,
  .trust-inner {
    width: min(calc(100% - 28px), var(--content));
  }

  .brand {
    font-size: 17px;
  }

  .hero {
    min-height: 0;
  }

  .hero h1 {
    font-size: 40px;
  }

  .hero-copy {
    font-size: 16px;
  }

  .hero-actions,
  .hero-actions .button {
    width: 100%;
  }

  .hero-visual {
    min-height: 430px;
  }

  .phone-shot {
    width: 235px;
  }

  .trust-inner,
  .feature-grid,
  .path-grid,
  .feature-detail-grid,
  .related {
    grid-template-columns: 1fr;
  }

  .trust-item + .trust-item,
  .trust-item:nth-child(3) {
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  .section {
    padding: 70px 0;
  }

  .section-head {
    align-items: flex-start;
    flex-direction: column;
  }

  .path-card {
    min-height: 290px;
    padding: 30px 24px;
  }

  .download-band .container,
  .footer-grid {
    display: grid;
    grid-template-columns: 1fr;
  }

  .download-band .button {
    width: 100%;
  }

  .footer-grid {
    gap: 30px;
  }

  .page-hero {
    padding: 65px 0 55px;
  }

  .page-hero h1 {
    font-size: 43px;
  }

  .article-figure {
    grid-template-columns: 1fr;
  }

  .article-figure img {
    width: min(100%, 280px);
    margin: 0 auto;
  }

  .step {
    padding: 72px 22px 24px;
  }

  .step::before {
    top: 20px;
    left: 22px;
  }

  .info-table,
  .info-table tbody,
  .info-table tr,
  .info-table th,
  .info-table td {
    display: block;
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}