:root {
  --ink: #102632;
  --ink-soft: #395768;
  --sea: #14b0bf;
  --sea-deep: #0f6f7f;
  --blue: #3387b5;
  --night: #000000;
  --gold: #fdc00f;
  --gold-soft: #fff3bd;
  --paper: #f7fbfb;
  --panel: #eef7f7;
  --line: #c9dddf;
  --white: #fbfefe;
  --danger: #b9483c;
  --shadow: 0 18px 42px rgba(15, 48, 63, 0.13);
  font-family: "Noto Sans SC", "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.72;
}

body.modal-open {
  overflow: hidden;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(247, 251, 251, 0.94);
  border-bottom: 1px solid rgba(201, 221, 223, 0.74);
  backdrop-filter: blur(16px);
}

.nav {
  width: min(1180px, calc(100% - 32px));
  min-height: 72px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 900;
  letter-spacing: 0;
}

.brand img {
  width: 50px;
  height: 50px;
}

.brand span {
  font-size: 1.1rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.nav-links a {
  padding: 9px 12px;
  border-radius: 8px;
  color: var(--ink-soft);
  font-weight: 700;
  font-size: 0.94rem;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--night);
  background: rgba(20, 176, 191, 0.11);
}

.download-trigger,
.secondary-action,
.ghost-action {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 0 18px;
  border: 0;
  border-radius: 8px;
  cursor: pointer;
  font: inherit;
  font-weight: 900;
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
}

.download-trigger {
  color: var(--night);
  background: var(--gold);
  box-shadow: 0 10px 24px rgba(253, 192, 15, 0.26);
}

.download-trigger:hover,
.secondary-action:hover,
.ghost-action:hover {
  transform: translateY(-2px);
}

.secondary-action {
  color: var(--white);
  background: var(--night);
}

.ghost-action {
  color: var(--night);
  background: transparent;
  border: 1px solid rgba(15, 48, 63, 0.22);
}

.hero {
  background:
    linear-gradient(120deg, rgba(20, 176, 191, 0.17), rgba(253, 192, 15, 0.11) 45%, rgba(51, 135, 181, 0.13)),
    var(--paper);
  border-bottom: 1px solid var(--line);
}

.hero-inner {
  width: min(1180px, calc(100% - 32px));
  min-height: calc(100vh - 72px);
  margin: 0 auto;
  padding: clamp(48px, 6vw, 86px) 0 36px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(380px, 1.08fr);
  gap: clamp(32px, 6vw, 78px);
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--sea-deep);
  font-weight: 900;
  font-size: 0.92rem;
}

.eyebrow::before {
  content: "";
  width: 34px;
  height: 4px;
  background: var(--gold);
  border-radius: 999px;
}

h1,
h2,
h3 {
  margin: 0;
  color: var(--night);
  line-height: 1.12;
  letter-spacing: 0;
}

h1 {
  margin-top: 18px;
  font-size: clamp(2.7rem, 6vw, 4rem);
}

.hero-copy {
  max-width: 66ch;
  margin: 24px 0 0;
  font-size: clamp(1.05rem, 2vw, 1.24rem);
  color: var(--ink-soft);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.trust-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 42px;
  max-width: 700px;
}

.trust-item {
  border-top: 3px solid var(--sea);
  padding-top: 12px;
}

.trust-item strong {
  display: block;
  font-size: 1.2rem;
  color: var(--night);
}

.trust-item span {
  color: var(--ink-soft);
  font-size: 0.93rem;
}

.hero-media {
  position: relative;
  align-self: stretch;
  display: flex;
  align-items: center;
}

.product-frame {
  width: 100%;
  background: var(--night);
  border: 1px solid rgba(15, 48, 63, 0.14);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.window-bar {
  height: 38px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 14px;
  background: #153a4a;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 99px;
  background: var(--gold);
}

.dot:nth-child(2) {
  background: var(--sea);
}

.dot:nth-child(3) {
  background: #e36b5e;
}

.product-frame img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.timeline-strip {
  position: absolute;
  left: 0px;
  right: 28px;
  bottom: 20px;
  display: grid;
  grid-template-columns: 0.7fr 1.2fr 0.35fr 0.9fr;
  gap: 5px;
  padding: 10px;
  background: rgba(15, 48, 63, 0.94);
  border: 1px solid rgba(253, 192, 15, 0.42);
  border-radius: 8px;
  box-shadow: 0 14px 28px rgba(15, 48, 63, 0.22);
}

.timeline-strip span {
  height: 18px;
  border-radius: 4px;
  background: var(--sea);
}

.timeline-strip span:nth-child(2) {
  background: var(--gold);
}

.timeline-strip span:nth-child(3) {
  background: #fc7e60;
}

.section {
  padding: clamp(60px, 8vw, 112px) 0;
}

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

.wrap {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
}

.section-head {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(280px, 0.7fr);
  gap: 28px;
  align-items: end;
  margin-bottom: 34px;
}

.section-head h2 {
  font-size: clamp(2rem, 4.2vw, 4rem);
}

.section-head p,
.lead {
  margin: 0;
  color: var(--ink-soft);
  font-size: 1.05rem;
}

.feature-grid,
.scenario-grid,
.review-grid,
.download-grid,
.faq-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
}

.feature-card,
.scenario-card,
.review-card,
.download-card,
.faq-card,
.source-box {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 24px;
}

.feature-card h3,
.scenario-card h3,
.review-card h3,
.download-card h3,
.faq-card h3 {
  font-size: 1.3rem;
  margin-bottom: 12px;
}

.feature-card p,
.scenario-card p,
.review-card p,
.download-card p,
.faq-card p,
.source-box p {
  margin: 0;
  color: var(--ink-soft);
}

.mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  margin-bottom: 18px;
  color: var(--night);
  background: var(--gold-soft);
  border: 1px solid rgba(253, 192, 15, 0.55);
  border-radius: 8px;
  font-weight: 900;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 1.1fr);
  gap: clamp(28px, 6vw, 70px);
  align-items: center;
}

.media-panel {
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--night);
  box-shadow: var(--shadow);
}

.media-panel img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.steps {
  display: grid;
  gap: 16px;
  margin-top: 28px;
}

.step {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 16px;
  align-items: start;
}

.step b {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  color: var(--night);
  background: var(--gold);
  border-radius: 8px;
}

.step p {
  margin: 4px 0 0;
  color: var(--ink-soft);
}

.page-hero {
  background:#0f6f7f;
  color: var(--white);
}

.page-hero .wrap {
  padding: clamp(62px, 10vw, 118px) 0;
}

.page-hero h1 {
  color: var(--white);
}

.page-hero p {
  max-width: 68ch;
  margin: 22px 0 0;
  color: #cfe2e5;
  font-size: 1.12rem;
}

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

.page-hero .eyebrow::before {
  background: var(--sea);
}

.download-card {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.download-card .meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.pill {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 0 10px;
  border-radius: 99px;
  background: var(--panel);
  color: var(--sea-deep);
  font-size: 0.84rem;
  font-weight: 800;
}

.compare-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}

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

.compare-table th {
  color: var(--night);
  background: var(--panel);
}

.compare-table tr:last-child td {
  border-bottom: 0;
}

.source-list {
  margin: 0;
  padding-left: 20px;
  color: var(--ink-soft);
}

.source-list a {
  color: var(--sea-deep);
  font-weight: 800;
}

.cta-band {
  background: var(--sea);
  color: var(--night);
}

.cta-band .wrap {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  align-items: center;
}

.cta-band h2 {
  font-size: clamp(1.9rem, 4vw, 3.5rem);
}

.cta-band p {
  max-width: 66ch;
  margin: 14px 0 0;
  color: #07323c;
}

.site-footer {
  background: var(--night);
  color: #cfe2e5;
  padding: 44px 0;
}

.footer-grid {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 28px;
  align-items: start;
}

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

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

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

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

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15, 48, 63, 0.72);
}

.modal-dialog {
  position: relative;
  width: min(720px, 100%);
  max-height: calc(100vh - 40px);
  overflow: auto;
  background: var(--white);
  border-radius: 8px;
  box-shadow: 0 32px 70px rgba(6, 22, 29, 0.34);
}

.modal-head {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: flex-start;
  padding: 26px 26px 18px;
  border-bottom: 1px solid var(--line);
}

.modal-head h2 {
  font-size: 1.8rem;
}

.modal-head p {
  margin: 8px 0 0;
  color: var(--ink-soft);
}

.modal-close {
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  cursor: pointer;
  font-size: 1.5rem;
  color: var(--night);
}

.qr-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  padding: 24px 26px 28px;
}

.qr-item {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 18px;
  text-align: center;
  background: var(--paper);
}

.qr-item img {
  width: min(220px, 100%);
  margin: 0 auto 12px;
  background: var(--white);
  padding: 10px;
  border-radius: 6px;
}

.qr-item h3 {
  font-size: 1.1rem;
}

.qr-item p {
  margin: 8px 0 0;
  color: var(--ink-soft);
  font-size: 0.94rem;
}

@media (max-width: 860px) {
  .nav {
    align-items: flex-start;
    flex-direction: column;
    padding: 14px 0;
  }

  .nav-links {
    justify-content: flex-start;
  }

  .hero-inner,
  .split,
  .section-head,
  .cta-band .wrap,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .hero-inner {
    min-height: auto;
  }

  .timeline-strip {
    position: static;
    margin-top: 12px;
  }

  .trust-row,
  .qr-grid {
    grid-template-columns: 1fr;
  }

  .cta-band .download-trigger {
    justify-self: start;
  }
}

@media (max-width: 540px) {
  .nav-links a {
    padding: 8px 9px;
    font-size: 0.9rem;
  }

  h1 {
    font-size: clamp(2.35rem, 13vw, 3.3rem);
  }

  .feature-card,
  .scenario-card,
  .review-card,
  .download-card,
  .faq-card,
  .source-box {
    padding: 20px;
  }

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

  .compare-table th {
    border-bottom: 0;
  }
}