:root {
  --ink: #16352b;
  --ink-soft: #345248;
  --paper: #fffef8;
  --white: #ffffff;
  --green: #1f9d68;
  --green-dark: #15724d;
  --green-pale: #e9f7ef;
  --yellow: #f5d547;
  --yellow-pale: #fff7ca;
  --coral: #ff6b5f;
  --line: #dce7e1;
  --muted: #6b7f77;
  --shadow: 0 14px 34px rgba(22, 53, 43, 0.12);
  --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;
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: 0;
}

body.no-scroll {
  overflow: hidden;
}

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

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

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

button {
  font: inherit;
}

.skip-link {
  position: fixed;
  left: 16px;
  top: -80px;
  z-index: 1000;
  padding: 10px 14px;
  color: var(--white);
  background: var(--ink);
}

.skip-link:focus {
  top: 16px;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid rgba(22, 53, 43, 0.1);
  background: rgba(255, 254, 248, 0.96);
  backdrop-filter: blur(14px);
}

.header-inner {
  display: flex;
  min-height: 72px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  font-size: 20px;
  font-weight: 800;
}

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

.site-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.site-nav a {
  padding: 8px 13px;
  border-radius: 6px;
  font-size: 15px;
  font-weight: 650;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--green-dark);
  background: var(--green-pale);
}

.site-nav .nav-download,
.button-primary {
  color: var(--white);
  background: var(--ink);
}

.site-nav .nav-download:hover {
  color: var(--ink);
  background: var(--yellow);
}

.menu-button {
  position: relative;
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 0;
  color: var(--ink);
  background: transparent;
  font-size: 0;
  cursor: pointer;
}

.menu-icon {
  display: grid;
  width: 24px;
  gap: 5px;
}

.menu-icon span {
  display: block;
  width: 24px;
  height: 2px;
  background: currentColor;
}

.hero {
  position: relative;
  min-height: min(690px, calc(100vh - 72px));
  overflow: hidden;
  background: var(--green);
}

.hero::before,
.hero::after {
  position: absolute;
  content: "";
  pointer-events: none;
}

.hero::after {
  left: 0;
  bottom: 0;
  width: 36%;
  height: 18px;
  background: var(--yellow);
}

.hero-inner {
  position: relative;
  z-index: 2;
  display: flex;
  min-height: inherit;
  align-items: center;
  padding: 62px 0 72px;
}

.hero-copy {
  position: relative;
  z-index: 4;
  width: 52%;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
  padding: 6px 10px;
  border: 2px solid var(--ink);
  background: var(--yellow);
  font-size: 13px;
  font-weight: 800;
}

.hero h1 {
  max-width: 560px;
  margin: 0;
  font-size: clamp(46px, 7vw, 76px);
  line-height: 1.02;
  letter-spacing: 0;
}

.hero-lead {
  max-width: 560px;
  margin: 26px 0 0;
  color: #103b2d;
  font-size: 18px;
  font-weight: 550;
}

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

.button {
  display: inline-flex;
  min-height: 50px;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 22px;
  border: 2px solid var(--ink);
  border-radius: 6px;
  font-weight: 800;
  cursor: pointer;
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.button:hover {
  transform: translateY(-2px);
  box-shadow: 5px 5px 0 var(--ink);
}

.button-primary {
  color: var(--white);
}

.button-light {
  background: var(--white);
}

.hero-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 24px;
  margin-top: 26px;
  font-size: 14px;
  font-weight: 700;
}

.hero-facts span::before {
  content: "✓";
  display: inline-grid;
  width: 20px;
  height: 20px;
  margin-right: 7px;
  place-items: center;
  border-radius: 50%;
  color: var(--white);
  background: var(--ink);
  font-size: 12px;
}

.hero-phones {
  position: absolute;
  z-index: 3;
  right: 0;
  bottom: 20px;
  display: flex;
  width: min(43vw, 500px);
  align-items: flex-end;
}

.phone {
  position: relative;
  flex: 0 0 52%;
  overflow: hidden;
  width: auto;
  padding: 8px;
  border: 4px solid var(--ink);
  border-radius: 28px;
  background: var(--ink);
  box-shadow: var(--shadow);
}

.phone img {
  width: 100%;
  max-width: 400px;
  aspect-ratio: 400 / 712;
  object-fit: cover;
  object-position: top;
  border-radius: 18px;
}

.phone-main {
  z-index: 2;
  transform: rotate(2deg);
}

.phone-side {
  z-index: 1;
  margin-right: -12%;
  transform: translateY(-12px) rotate(-7deg);
}

.trust-strip {
  border-bottom: 1px solid var(--line);
  background: var(--white);
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.trust-item {
  min-height: 104px;
  padding: 20px;
  border-right: 1px solid var(--line);
}

.trust-item:last-child {
  border-right: 0;
}

.trust-item strong {
  display: block;
  font-size: 23px;
  line-height: 1.2;
}

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

.section {
  padding: 86px 0;
}

.section-alt {
  background: var(--green-pale);
}

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

.section-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 28px;
  margin-bottom: 42px;
}

.section-heading h2 {
  max-width: 680px;
  margin: 0;
  font-size: clamp(30px, 4vw, 52px);
  line-height: 1.15;
  letter-spacing: 0;
}

.section-number {
  flex: 0 0 auto;
  color: var(--green);
  font-size: 16px;
  font-weight: 900;
}

.section-dark .section-number {
  color: var(--yellow);
}

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

.feature-card {
  min-height: 250px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.feature-card:nth-child(2),
.feature-card:nth-child(5) {
  border-top: 6px solid var(--yellow);
}

.feature-card:nth-child(3),
.feature-card:nth-child(4) {
  border-top: 6px solid var(--coral);
}

.feature-icon {
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  border-radius: 50%;
  color: var(--white);
  background: var(--ink);
  font-size: 22px;
  font-weight: 900;
}

.feature-card h3 {
  margin: 30px 0 8px;
  font-size: 21px;
}

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

.preview-rail {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px;
}

.preview-button {
  position: relative;
  overflow: hidden;
  padding: 0;
  border: 0;
  border-radius: 8px;
  background: transparent;
  cursor: zoom-in;
}

.preview-button::after {
  position: absolute;
  right: 10px;
  bottom: 10px;
  display: grid;
  width: 36px;
  height: 36px;
  content: "+";
  place-items: center;
  border: 2px solid var(--ink);
  border-radius: 50%;
  color: var(--ink);
  background: var(--yellow);
  font-size: 24px;
  font-weight: 900;
}

.preview-button img {
  width: 100%;
  max-width: 400px;
  aspect-ratio: 9 / 16;
  object-fit: cover;
  object-position: top;
  transition: transform 220ms ease;
}

.preview-button:hover img {
  transform: scale(1.025);
}

.preview-labels {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px;
  margin-top: 12px;
  font-size: 14px;
  font-weight: 750;
  text-align: center;
}

.path-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 20px;
}

.path-panel {
  position: relative;
  overflow: hidden;
  min-height: 340px;
  padding: 34px;
  border: 2px solid var(--ink);
  border-radius: 8px;
  background: var(--yellow);
}

.path-panel:last-child {
  color: var(--white);
  background: var(--coral);
}

.path-panel .path-index {
  position: absolute;
  right: 20px;
  top: 10px;
  color: rgba(22, 53, 43, 0.15);
  font-size: 96px;
  font-weight: 900;
  line-height: 1;
}

.path-panel h3 {
  position: relative;
  margin: 76px 0 12px;
  font-size: 30px;
}

.path-panel p {
  position: relative;
  max-width: 520px;
  margin: 0 0 26px;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-bottom: 2px solid currentColor;
  font-weight: 850;
}

.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border: 2px solid var(--ink);
  border-radius: 8px;
  background: var(--white);
}

.step {
  min-height: 250px;
  padding: 26px;
  border-right: 1px solid var(--line);
}

.step:last-child {
  border-right: 0;
}

.step strong {
  display: inline-grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 50%;
  color: var(--white);
  background: var(--green);
}

.step h3 {
  margin: 42px 0 10px;
  font-size: 20px;
}

.step p {
  margin: 0;
  color: var(--ink-soft);
}

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

.review-card {
  padding: 26px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 8px;
}

.review-card blockquote {
  margin: 0 0 24px;
  font-size: 17px;
}

.review-card cite {
  color: var(--yellow);
  font-size: 14px;
  font-style: normal;
  font-weight: 800;
}

.faq-list {
  border-top: 2px solid var(--ink);
}

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

.faq-question {
  display: flex;
  width: 100%;
  min-height: 66px;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 14px 0;
  border: 0;
  color: var(--ink);
  background: transparent;
  font-weight: 800;
  text-align: left;
  cursor: pointer;
}

.faq-question span:last-child {
  flex: 0 0 auto;
  font-size: 24px;
  transition: transform 160ms ease;
}

.faq-answer {
  display: none;
  max-width: 880px;
  padding: 0 42px 22px 0;
  color: var(--ink-soft);
}

.faq-answer p {
  margin: 0;
}

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

.faq-item.is-open .faq-question span:last-child {
  transform: rotate(45deg);
}

.bottom-cta {
  position: relative;
  overflow: hidden;
  padding: 70px 0;
  background: var(--yellow);
}

.bottom-cta::after {
  position: absolute;
  right: -35px;
  bottom: -60px;
  width: 220px;
  height: 220px;
  border: 26px solid var(--coral);
  border-radius: 50%;
  content: "";
}

.cta-inner {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 34px;
}

.cta-copy h2 {
  margin: 0 0 8px;
  font-size: clamp(30px, 4vw, 50px);
  line-height: 1.15;
}

.cta-copy p {
  margin: 0;
}

.site-footer {
  padding: 50px 0 26px;
  color: #d6e5df;
  background: #0e251e;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 48px;
}

.footer-brand {
  color: var(--white);
}

.footer-copy,
.disclaimer {
  color: #a9beb5;
  font-size: 14px;
}

.footer-title {
  margin: 0 0 12px;
  color: var(--yellow);
  font-size: 15px;
}

.footer-links {
  display: grid;
  gap: 8px;
}

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

.footer-bottom {
  margin-top: 36px;
  padding-top: 22px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.footer-bottom p {
  margin: 6px 0;
}

.lightbox[hidden] {
  display: none;
}

.lightbox {
  position: fixed;
  z-index: 500;
  inset: 0;
  display: grid;
  padding: 30px;
  place-items: center;
  background: rgba(8, 24, 19, 0.92);
}

.lightbox-dialog {
  position: relative;
  display: grid;
  max-height: calc(100vh - 60px);
  grid-template-rows: minmax(0, 1fr) auto;
  gap: 12px;
  justify-items: center;
}

.lightbox img {
  width: auto;
  max-width: min(400px, 90vw);
  max-height: calc(100vh - 120px);
  border: 5px solid var(--white);
  border-radius: 8px;
}

.lightbox-caption {
  color: var(--white);
  font-weight: 700;
}

.lightbox-close {
  position: fixed;
  right: 22px;
  top: 18px;
  width: 46px;
  height: 46px;
  border: 0;
  border-radius: 50%;
  color: var(--ink);
  background: var(--yellow);
  font-size: 30px;
  cursor: pointer;
}

.page-hero {
  padding: 72px 0 58px;
  color: var(--white);
  background: var(--ink);
}

.page-hero .eyebrow {
  color: var(--ink);
}

.page-hero h1 {
  max-width: 850px;
  margin: 0;
  font-size: clamp(40px, 6vw, 72px);
  line-height: 1.1;
}

.page-hero p {
  max-width: 760px;
  margin: 20px 0 0;
  color: #cce0d7;
  font-size: 18px;
}

.breadcrumb {
  margin-bottom: 26px;
  color: #b5c9c0;
  font-size: 14px;
}

.breadcrumb a:hover {
  color: var(--yellow);
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 62px;
  align-items: start;
}

.article-content h2 {
  margin: 64px 0 24px;
  font-size: clamp(27px, 4vw, 42px);
  line-height: 1.2;
}

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

.article-content h3 {
  margin: 32px 0 10px;
  font-size: 22px;
}

.article-content p {
  margin: 0 0 16px;
  color: var(--ink-soft);
}

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

.article-aside {
  position: sticky;
  top: 98px;
  padding: 22px;
  border-left: 5px solid var(--yellow);
  background: var(--green-pale);
}

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

.article-aside a {
  display: block;
  padding: 7px 0;
  border-bottom: 1px solid rgba(22, 53, 43, 0.12);
  font-size: 14px;
}

.guide-step {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 20px;
  margin-bottom: 18px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.guide-step-number {
  display: grid;
  width: 52px;
  height: 52px;
  place-items: center;
  border-radius: 50%;
  color: var(--white);
  background: var(--green);
  font-size: 20px;
  font-weight: 900;
}

.guide-step h3 {
  margin-top: 0;
}

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

.notice {
  margin: 26px 0;
  padding: 22px;
  border: 2px solid var(--ink);
  border-left: 10px solid var(--coral);
  background: var(--yellow-pale);
}

.notice strong {
  display: block;
  margin-bottom: 6px;
}

.check-list {
  display: grid;
  gap: 10px;
  margin: 20px 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  position: relative;
  padding-left: 34px;
}

.check-list li::before {
  position: absolute;
  left: 0;
  top: 3px;
  display: grid;
  width: 23px;
  height: 23px;
  content: "✓";
  place-items: center;
  border-radius: 50%;
  color: var(--white);
  background: var(--green);
  font-size: 13px;
  font-weight: 900;
}

.feature-detail {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  gap: 26px;
  padding: 30px 0;
  border-bottom: 1px solid var(--line);
}

.feature-detail-label {
  color: var(--green-dark);
  font-weight: 900;
}

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

.back-to-top {
  position: fixed;
  z-index: 80;
  right: 20px;
  bottom: 20px;
  display: grid;
  width: 46px;
  height: 46px;
  padding: 0;
  place-items: center;
  border: 2px solid var(--ink);
  border-radius: 50%;
  color: var(--ink);
  background: var(--yellow);
  font-size: 22px;
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px);
  transition: 160ms ease;
  cursor: pointer;
}

.back-to-top.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

@media (max-width: 980px) {
  .hero-copy {
    width: 52%;
  }

  .hero-phones {
    right: 0;
    width: min(42vw, 410px);
  }

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

  .preview-rail,
  .preview-labels {
    grid-template-columns: repeat(3, 1fr);
  }

  .preview-labels span:nth-child(n+4) {
    display: none;
  }

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

  .step:nth-child(2) {
    border-right: 0;
  }

  .step:nth-child(-n+2) {
    border-bottom: 1px solid var(--line);
  }

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

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

@media (max-width: 760px) {
  .container {
    width: min(calc(100% - 28px), var(--content));
  }

  .header-inner {
    min-height: 64px;
  }

  .brand {
    font-size: 18px;
  }

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

  .menu-button {
    display: grid;
    place-items: center;
  }

  .site-nav {
    position: absolute;
    left: 0;
    top: 64px;
    display: none;
    width: 100%;
    padding: 12px 14px 18px;
    border-bottom: 1px solid var(--line);
    background: var(--paper);
  }

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

  .site-nav a {
    min-height: 44px;
  }

  .hero {
    min-height: 760px;
  }

  .hero-inner {
    align-items: flex-start;
    padding-top: 46px;
  }

  .hero-copy {
    width: 100%;
  }

  .hero h1 {
    max-width: 100%;
    font-size: 48px;
  }

  .hero-lead {
    max-width: 430px;
    font-size: 16px;
  }

  .hero-phones {
    right: auto;
    left: 50%;
    bottom: 8px;
    width: min(88vw, 360px);
    transform: translateX(-50%);
  }

  .phone {
    border-radius: 22px;
  }

  .phone-side {
    margin-right: -12%;
  }

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

  .trust-item:nth-child(2) {
    border-right: 0;
  }

  .trust-item:nth-child(-n+2) {
    border-bottom: 1px solid var(--line);
  }

  .section {
    padding: 64px 0;
  }

  .section-heading {
    align-items: flex-start;
    flex-direction: column-reverse;
    gap: 8px;
    margin-bottom: 30px;
  }

  .feature-grid,
  .review-grid,
  .path-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .feature-card {
    min-height: auto;
  }

  .preview-rail,
  .preview-labels {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .preview-labels {
    display: none;
  }

  .preview-button:nth-child(5) {
    grid-column: 1 / -1;
    width: 50%;
    justify-self: center;
  }

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

  .step,
  .step:nth-child(2) {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .step:last-child {
    border-bottom: 0;
  }

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

  .page-hero {
    padding: 54px 0 42px;
  }

  .page-hero h1 {
    font-size: 42px;
  }

  .article-content h2 {
    margin-top: 48px;
  }

  .guide-step,
  .feature-detail {
    grid-template-columns: 1fr;
  }

  .lightbox {
    padding: 20px;
  }
}

@media (max-width: 420px) {
  .hero h1 {
    font-size: 44px;
  }

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

  .hero-facts {
    display: grid;
    gap: 8px;
  }

  .trust-item {
    padding: 16px;
  }

  .trust-item strong {
    font-size: 19px;
  }

  .preview-rail {
    gap: 8px;
  }
}

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

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