:root {
  --chestnut: #6d342a;
  --chestnut-dark: #45221c;
  --amber: #f2b84b;
  --amber-light: #ffe4a8;
  --teal: #176b66;
  --teal-dark: #103f3c;
  --coral: #dc654d;
  --ink: #1f2927;
  --muted: #65716e;
  --paper: #fffdf9;
  --paper-warm: #f7f1e7;
  --line: #ded8ce;
  --white: #ffffff;
  --shadow: 0 18px 50px rgba(31, 41, 39, 0.14);
  --container: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Microsoft YaHei", "PingFang SC", system-ui, -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.72;
}

body.menu-open {
  overflow: hidden;
}

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

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

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

:focus-visible {
  outline: 3px solid var(--amber);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  z-index: 200;
  top: 10px;
  left: 10px;
  padding: 8px 14px;
  color: var(--white);
  background: var(--teal-dark);
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: translateY(0);
}

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

.site-header {
  position: sticky;
  z-index: 100;
  top: 0;
  border-bottom: 1px solid rgba(222, 216, 206, 0.9);
  background: rgba(255, 253, 249, 0.96);
  backdrop-filter: blur(14px);
}

.nav-wrap {
  display: flex;
  min-height: 72px;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.brand {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 10px;
  color: var(--chestnut-dark);
  font-size: 20px;
  font-weight: 900;
}

.brand img {
  width: 42px;
  height: 42px;
  border-radius: 8px;
}

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

.site-nav > a:not(.btn) {
  position: relative;
  color: #384440;
  font-weight: 700;
}

.site-nav > a:not(.btn)::after {
  position: absolute;
  right: 0;
  bottom: -7px;
  left: 0;
  height: 3px;
  background: var(--teal);
  content: "";
  opacity: 0;
  transform: scaleX(0.3);
  transition: 0.2s ease;
}

.site-nav > a:hover::after,
.site-nav > a.active::after {
  opacity: 1;
  transform: scaleX(1);
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 10px;
  border: 0;
  background: transparent;
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  margin: 5px 0;
  background: var(--ink);
  transition: 0.2s ease;
}

.btn {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  border: 2px solid transparent;
  border-radius: 6px;
  font-weight: 900;
  line-height: 1.2;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  color: var(--ink);
  background: var(--amber);
  box-shadow: 5px 5px 0 var(--chestnut);
}

.btn-primary:hover {
  box-shadow: 3px 3px 0 var(--chestnut);
}

.btn-secondary {
  border-color: var(--paper);
  color: var(--paper);
  background: transparent;
}

.btn-secondary:hover {
  color: var(--teal-dark);
  background: var(--paper);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 18px;
  color: var(--amber);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0;
}

.eyebrow::before {
  width: 22px;
  height: 4px;
  background: currentColor;
  content: "";
}

.hero {
  position: relative;
  overflow: hidden;
  min-height: 640px;
  color: var(--white);
  background: var(--teal-dark);
}

.hero::before,
.hero::after {
  position: absolute;
  border: 3px solid rgba(242, 184, 75, 0.22);
  content: "";
  transform: rotate(11deg);
}

.hero::before {
  top: 70px;
  right: -80px;
  width: 310px;
  height: 310px;
}

.hero::after {
  bottom: -100px;
  left: 42%;
  width: 220px;
  height: 220px;
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  min-height: 640px;
  grid-template-columns: minmax(0, 0.95fr) minmax(420px, 1.05fr);
  align-items: center;
  gap: 72px;
  padding-block: 58px 46px;
}

.hero-copy {
  padding-block: 30px;
}

.hero h1 {
  max-width: 650px;
  margin: 0;
  color: var(--white);
  font-size: clamp(46px, 7vw, 82px);
  line-height: 1.06;
  letter-spacing: 0;
}

.hero-copy > p:not(.eyebrow) {
  max-width: 640px;
  margin: 24px 0 0;
  color: #dbe7e4;
  font-size: 18px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 32px;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
  margin: 28px 0 0;
  padding: 0;
  color: #bcd0cc;
  font-size: 14px;
  list-style: none;
}

.hero-meta li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.hero-meta li::before {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--amber);
  content: "";
}

.hero-visual {
  position: relative;
  min-height: 520px;
}

.hero-poster {
  position: absolute;
  z-index: 2;
  right: 22%;
  bottom: -20px;
  width: min(45%, 260px);
  height: auto;          /* 新增 */
  max-width: 400px;
  border: 8px solid var(--paper);
  border-radius: 28px;
  box-shadow: var(--shadow);
  transform: rotate(-3deg);
}

.hero-screen {
  position: absolute;
  z-index: 1;
  right: -4%;
  bottom: -50px;
  width: min(43%, 250px);
  height: auto;          /* 新增 */
  max-width: 400px;
  border: 8px solid var(--paper);
  border-radius: 28px;
  box-shadow: var(--shadow);
  transform: rotate(7deg);
}

.sound-effect {
  position: absolute;
  z-index: 3;
  top: 68px;
  left: 0;
  padding: 8px 15px;
  border: 3px solid var(--ink);
  color: var(--ink);
  background: var(--amber);
  box-shadow: 5px 5px 0 var(--paper);
  font-size: 24px;
  font-weight: 900;
  transform: rotate(-7deg);
}

.fact-strip {
  border-bottom: 1px solid var(--line);
  background: var(--paper-warm);
}

.fact-list {
  display: grid;
  margin: 0;
  padding: 22px 0;
  grid-template-columns: repeat(4, 1fr);
  list-style: none;
}

.fact-list li {
  padding: 2px 24px;
  border-right: 1px solid var(--line);
  text-align: center;
}

.fact-list li:last-child {
  border-right: 0;
}

.fact-list strong,
.fact-list span {
  display: block;
}

.fact-list strong {
  color: var(--chestnut);
  font-size: 22px;
}

.fact-list span {
  color: var(--muted);
  font-size: 13px;
}

.section {
  padding-block: 92px;
}

.section-compact {
  padding-block: 66px;
}

.section-warm {
  background: var(--paper-warm);
}

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

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

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 30px;
  margin-bottom: 40px;
}

.section-heading h2,
.section-heading h1 {
  max-width: 760px;
  margin: 0;
  color: var(--ink);
  font-size: clamp(32px, 5vw, 52px);
  line-height: 1.16;
  letter-spacing: 0;
}

.section-dark .section-heading h2,
.section-dark .section-heading h1,
.section-teal .section-heading h2,
.section-teal .section-heading h1 {
  color: var(--white);
}

.section-index {
  flex: 0 0 auto;
  color: var(--coral);
  font-size: 14px;
  font-weight: 900;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.feature-card {
  min-height: 250px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--white);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.feature-card:hover {
  border-color: var(--teal);
  transform: translateY(-4px);
}

.feature-number {
  display: inline-grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border: 2px solid var(--ink);
  color: var(--ink);
  background: var(--amber);
  box-shadow: 3px 3px 0 var(--chestnut);
  font-weight: 900;
}

.feature-card h3 {
  margin: 26px 0 10px;
  font-size: 22px;
  line-height: 1.3;
}

.feature-card p {
  margin: 0;
  color: var(--muted);
}

.showcase-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 22px;
}

.shot {
  margin: 0;
}

.shot img {
  width: 100%;
  height: auto;
  max-width: 400px;
  margin-inline: auto;
  border: 7px solid var(--white);
  border-radius: 24px;
  box-shadow: var(--shadow);
}

.shot:nth-child(even) {
  padding-top: 42px;
}

.shot figcaption {
  margin-top: 16px;
  color: #cbd7d4;
  font-size: 14px;
  text-align: center;
}

.split {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  align-items: center;
  gap: 78px;
}

.split-media img {
  width: min(100%, 380px);
  max-width: 400px;
  margin-inline: auto;
  border: 8px solid var(--white);
  border-radius: 28px;
  box-shadow: var(--shadow);
}

.split-copy h2 {
  margin: 0 0 24px;
  font-size: clamp(32px, 5vw, 50px);
  line-height: 1.14;
  letter-spacing: 0;
}

.split-copy p {
  margin: 0 0 18px;
  color: var(--muted);
}

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

.check-list li {
  position: relative;
  padding-left: 32px;
  font-weight: 700;
}

.check-list li::before {
  position: absolute;
  top: 3px;
  left: 0;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  color: var(--white);
  background: var(--teal);
  content: "✓";
  font-size: 13px;
  line-height: 20px;
  text-align: center;
}

.path-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.path-card {
  display: flex;
  min-height: 260px;
  flex-direction: column;
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--white);
}

.path-card .tag,
.content-tag {
  align-self: flex-start;
  padding: 4px 10px;
  color: var(--white);
  background: var(--teal);
  font-size: 12px;
  font-weight: 900;
}

.path-card h3 {
  margin: 24px 0 12px;
  font-size: 25px;
  line-height: 1.25;
}

.path-card p {
  margin: 0 0 24px;
  color: var(--muted);
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: auto;
  color: var(--chestnut);
  font-weight: 900;
}

.text-link::after {
  content: "→";
  transition: transform 0.2s ease;
}

.text-link:hover::after {
  transform: translateX(4px);
}

.review-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.review {
  margin: 0;
  padding: 28px;
  border: 1px solid #38514d;
  border-radius: 6px;
  background: #263431;
}

.review p {
  margin: 0 0 22px;
  color: #edf4f2;
  font-size: 17px;
}

.review footer {
  color: var(--amber);
  font-size: 14px;
  font-weight: 900;
}

.rating-line {
  margin-bottom: 12px;
  color: var(--amber);
  letter-spacing: 0;
}

.cta-band {
  position: relative;
  overflow: hidden;
  color: var(--white);
  background: var(--chestnut);
}

.cta-band::after {
  position: absolute;
  top: -80px;
  right: 7%;
  width: 210px;
  height: 210px;
  border: 4px solid rgba(255, 255, 255, 0.2);
  content: "";
  transform: rotate(19deg);
}

.cta-inner {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  padding-block: 56px;
}

.cta-inner h2 {
  margin: 0;
  color: var(--white);
  font-size: clamp(30px, 5vw, 48px);
  line-height: 1.15;
}

.cta-inner p {
  max-width: 720px;
  margin: 12px 0 0;
  color: #f1dcd6;
}

.page-hero {
  border-bottom: 1px solid var(--line);
  background: var(--paper-warm);
}

.page-hero-inner {
  display: grid;
  min-height: 410px;
  grid-template-columns: minmax(0, 1fr) 320px;
  align-items: center;
  gap: 80px;
  padding-block: 70px;
}

.page-hero h1 {
  max-width: 820px;
  margin: 0;
  color: var(--chestnut-dark);
  font-size: clamp(40px, 7vw, 68px);
  line-height: 1.08;
  letter-spacing: 0;
}

.page-hero p:not(.eyebrow) {
  max-width: 760px;
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 18px;
}

.page-marker {
  display: grid;
  width: 250px;
  height: 250px;
  place-items: center;
  border: 4px solid var(--ink);
  color: var(--ink);
  background: var(--amber);
  box-shadow: 14px 14px 0 var(--teal);
  font-size: 74px;
  font-weight: 900;
  transform: rotate(4deg);
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  align-items: start;
  gap: 70px;
}

.article-content h2 {
  margin: 72px 0 24px;
  padding-bottom: 12px;
  border-bottom: 3px solid var(--amber);
  color: var(--chestnut-dark);
  font-size: 32px;
  line-height: 1.25;
  letter-spacing: 0;
}

.article-content h2:first-child {
  margin-top: 0;
}

.article-content h3 {
  margin: 32px 0 12px;
  font-size: 23px;
  line-height: 1.35;
}

.article-content p {
  margin: 0 0 18px;
  color: #495451;
}

.article-content a:not(.btn) {
  color: var(--teal);
  font-weight: 800;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.article-content .btn {
  color: var(--ink);
}

.article-aside {
  position: sticky;
  top: 96px;
  padding: 24px;
  border-left: 5px solid var(--teal);
  background: var(--paper-warm);
}

.article-aside strong {
  display: block;
  margin-bottom: 12px;
  color: var(--chestnut);
  font-size: 18px;
}

.article-aside a {
  display: block;
  padding-block: 8px;
  color: var(--muted);
  font-weight: 700;
}

.article-aside a:hover {
  color: var(--teal);
}

.steps {
  display: grid;
  gap: 18px;
  margin: 24px 0 40px;
}

.step {
  display: grid;
  grid-template-columns: 76px 1fr;
  gap: 22px;
  padding: 25px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--white);
}

.step-no {
  display: grid;
  width: 58px;
  height: 58px;
  place-items: center;
  color: var(--white);
  background: var(--teal);
  font-size: 24px;
  font-weight: 900;
}

.step h3 {
  margin: 0 0 8px;
}

.step p {
  margin: 0;
}

.note {
  margin: 28px 0;
  padding: 22px 24px;
  border-left: 5px solid var(--coral);
  background: #fff0ec;
}

.note strong {
  display: block;
  margin-bottom: 6px;
  color: var(--chestnut);
}

.inline-shot {
  width: min(100%, 360px);
  max-width: 400px;
  margin: 28px auto;
  border: 7px solid var(--white);
  border-radius: 24px;
  box-shadow: var(--shadow);
}

.mode-table {
  width: 100%;
  margin: 22px 0 34px;
  border-collapse: collapse;
}

.mode-table th,
.mode-table td {
  padding: 16px;
  border: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.mode-table th {
  color: var(--white);
  background: var(--teal);
}

.faq-list {
  display: grid;
  gap: 12px;
}

.faq-item {
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--white);
}

.faq-item summary {
  position: relative;
  padding: 20px 54px 20px 22px;
  color: var(--ink);
  cursor: pointer;
  font-size: 18px;
  font-weight: 900;
  list-style: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  position: absolute;
  top: 50%;
  right: 22px;
  width: 24px;
  height: 24px;
  color: var(--white);
  background: var(--teal);
  content: "+";
  line-height: 23px;
  text-align: center;
  transform: translateY(-50%);
}

.faq-item[open] summary::after {
  content: "−";
}

.faq-answer {
  padding: 0 22px 20px;
  color: var(--muted);
}

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

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

.related-link {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--white);
}

.related-link strong {
  display: block;
  margin-bottom: 8px;
  color: var(--chestnut);
  font-size: 20px;
}

.site-footer {
  color: #c5d1ce;
  background: #14201e;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr 1.25fr;
  gap: 60px;
  padding-block: 58px 40px;
}

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--white);
  font-size: 20px;
  font-weight: 900;
}

.footer-brand img {
  width: 40px;
  height: 40px;
  border-radius: 8px;
}

.footer-grid h2 {
  margin: 0 0 16px;
  color: var(--white);
  font-size: 16px;
}

.footer-grid p {
  margin: 14px 0 0;
  font-size: 14px;
}

.footer-links a {
  display: block;
  width: fit-content;
  padding-block: 5px;
}

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

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding-block: 22px;
  border-top: 1px solid #30413e;
  font-size: 13px;
}

.footer-bottom p {
  margin: 0;
}

@media (max-width: 980px) {
  .menu-toggle {
    display: block;
  }

  .site-nav {
    position: fixed;
    z-index: 99;
    top: 73px;
    right: 0;
    bottom: 0;
    left: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
    padding: 30px 24px;
    background: var(--paper);
  }

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

  .site-nav > a {
    padding: 12px;
    text-align: center;
  }

  .hero-grid {
    grid-template-columns: 1fr 0.8fr;
    gap: 30px;
  }

  .hero-visual {
    min-height: 440px;
  }

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

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

  .split {
    gap: 44px;
  }

  .page-hero-inner {
    grid-template-columns: 1fr 190px;
    gap: 40px;
  }

  .page-marker {
    width: 180px;
    height: 180px;
    font-size: 54px;
  }

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

  .article-aside {
    position: static;
    order: -1;
  }
}

@media (max-width: 720px) {
  .container {
    width: min(calc(100% - 28px), var(--container));
  }

  .nav-wrap {
    min-height: 64px;
  }

  .brand {
    font-size: 18px;
  }

  .brand img {
    width: 38px;
    height: 38px;
  }

  .site-nav {
    top: 65px;
  }

  .hero,
  .hero-grid {
    min-height: auto;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    padding-block: 42px 0;
  }

  .hero h1 {
    font-size: 48px;
  }

  .hero-copy > p:not(.eyebrow) {
    font-size: 16px;
  }

  .hero-visual {
    min-height: 410px;
  }

  .hero-poster {
    right: 40%;
    width: 45%;
  }

  .hero-screen {
    right: 4%;
    width: 43%;
  }

  .sound-effect {
    top: 20px;
    font-size: 18px;
  }

  .fact-list {
    grid-template-columns: repeat(2, 1fr);
  }

  .fact-list li:nth-child(2) {
    border-right: 0;
  }

  .fact-list li:nth-child(-n + 2) {
    margin-bottom: 18px;
  }

  .section {
    padding-block: 66px;
  }

  .section-heading {
    align-items: flex-start;
    flex-direction: column;
    margin-bottom: 28px;
  }

  .feature-grid,
  .path-grid,
  .review-grid,
  .showcase-grid,
  .related-links {
    grid-template-columns: 1fr;
  }

  .shot:nth-child(even) {
    padding-top: 0;
  }

  .shot img {
    width: min(100%, 330px);
    height: auto;
  }

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

  .split-media {
    order: 2;
  }

  .cta-inner {
    align-items: flex-start;
    flex-direction: column;
  }

  .page-hero-inner {
    min-height: auto;
    grid-template-columns: 1fr;
    padding-block: 52px;
  }

  .page-hero h1 {
    font-size: 44px;
  }

  .page-marker {
    display: none;
  }

  .step {
    grid-template-columns: 52px 1fr;
    gap: 14px;
    padding: 20px;
  }

  .step-no {
    width: 46px;
    height: 46px;
    font-size: 20px;
  }

  .mode-table {
    display: block;
    overflow-x: auto;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 34px;
  }

  .footer-bottom {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}