:root {
  --bg: #f3f3ee;
  --surface: rgba(255, 255, 255, 0.92);
  --surface-solid: #ffffff;
  --text: #18211b;
  --muted: #627066;
  --line: rgba(24, 33, 27, 0.08);
  --primary: #23382d;
  --primary-soft: #edf4ee;
  --accent: #cb7f27;
  --cool: #3d7ea6;
  --warm-bg: linear-gradient(160deg, #fff2df 0%, #f6dfbc 100%);
  --cool-bg: linear-gradient(160deg, #e9f5ff 0%, #dcecff 100%);
  --shadow: 0 20px 60px rgba(22, 31, 26, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "PingFang SC", "Noto Serif SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top right, rgba(83, 122, 101, 0.12), transparent 28%),
    radial-gradient(circle at left top, rgba(221, 179, 111, 0.16), transparent 32%),
    linear-gradient(180deg, #f7f4ec 0%, #eef3ef 100%);
}

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

.container {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(14px);
  background: rgba(247, 244, 236, 0.82);
  border-bottom: 1px solid rgba(24, 33, 27, 0.06);
}

.topbar-inner {
  min-height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #192c22 0%, #395543 100%);
  color: #f4efe1;
  font-size: 20px;
  font-weight: 700;
}

.brand-text {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.nav {
  display: flex;
  align-items: center;
  gap: 28px;
  color: var(--muted);
  font-size: 15px;
}

.nav a:hover {
  color: var(--primary);
}

.hero {
  padding: 92px 0 72px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.8fr);
  gap: 34px;
  align-items: center;
}

.eyebrow,
.section-label,
.therapy-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  border-radius: 999px;
  background: rgba(93, 143, 110, 0.12);
  color: #4d785d;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.hero h1 {
  margin: 22px 0 0;
  font-size: clamp(44px, 6vw, 76px);
  line-height: 1.02;
  letter-spacing: -0.04em;
}

.hero h1 span {
  display: block;
  margin-top: 10px;
  color: transparent;
  background: linear-gradient(90deg, #2d5b46 0%, #4a95ab 56%, #cb7f27 100%);
  -webkit-background-clip: text;
  background-clip: text;
}

.hero p,
.section-head p,
.feature-sub,
.feature-list span,
.plan-scene,
.plan-desc,
.footer-copy,
.footer a {
  color: var(--muted);
  line-height: 1.7;
}

.hero p {
  max-width: 720px;
  margin: 24px 0 0;
  font-size: 18px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  margin-top: 34px;
}

.btn {
  min-height: 54px;
  padding: 0 26px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 700;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: var(--shadow);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid var(--line);
}

.hero-panel-card,
.feature-card,
.plan-shell,
.footer {
  box-shadow: var(--shadow);
}

.hero-panel-card {
  padding: 26px;
  border: 1px solid rgba(24, 33, 27, 0.06);
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.78);
}

.hero-stat + .hero-stat {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid rgba(24, 33, 27, 0.08);
}

.hero-stat-label {
  display: block;
  color: #6d746f;
  font-size: 13px;
  margin-bottom: 7px;
}

.hero-stat strong {
  font-size: 22px;
}

.section {
  padding: 46px 0 84px;
}

.section-head {
  max-width: 780px;
}

.section-head h2 {
  margin: 18px 0 10px;
  font-size: clamp(32px, 4vw, 50px);
  line-height: 1.08;
  letter-spacing: -0.03em;
}

.section-head p {
  margin: 0;
  font-size: 17px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
  margin-top: 34px;
}

.feature-card {
  padding: 34px;
  border-radius: 32px;
  border: 1px solid rgba(24, 33, 27, 0.06);
}

.feature-card.warm {
  background: var(--warm-bg);
}

.feature-card.cool {
  background: var(--cool-bg);
}

.feature-icon {
  width: 72px;
  height: 72px;
  border-radius: 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.8);
  font-size: 28px;
  font-weight: 700;
}

.feature-card h3 {
  margin: 24px 0 8px;
  font-size: 34px;
}

.feature-sub {
  font-size: 18px;
  color: #45604e;
}

.feature-list {
  list-style: none;
  padding: 0;
  margin: 26px 0 0;
  display: grid;
  gap: 18px;
}

.feature-list li {
  display: grid;
  gap: 6px;
}

.feature-list strong {
  font-size: 19px;
}

.plans-section {
  padding-top: 30px;
}

.company-section {
  padding-top: 20px;
}

.company-card-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 0.8fr;
  gap: 22px;
  margin-top: 34px;
}

.company-card {
  padding: 30px;
  border-radius: 30px;
  border: 1px solid rgba(24, 33, 27, 0.08);
  background: rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow);
}

.company-card-intro {
  background:
    radial-gradient(circle at top right, rgba(93, 143, 110, 0.12), transparent 28%),
    linear-gradient(180deg, #f7fbf7 0%, #f1f6f2 100%);
}

.company-card h3 {
  margin: 0 0 14px;
  font-size: 24px;
}

.company-card p,
.company-card a {
  margin: 0;
  color: var(--muted);
  line-height: 1.8;
  font-size: 16px;
}

.plan-shell {
  display: grid;
  grid-template-columns: 360px minmax(0, 1fr);
  gap: 0;
  margin-top: 36px;
  border: 1px solid rgba(24, 33, 27, 0.06);
  border-radius: 34px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.86);
}

.plan-sidebar {
  padding: 32px;
  background: rgba(243, 245, 239, 0.78);
  border-right: 1px solid rgba(24, 33, 27, 0.06);
}

.panel-title {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: #778278;
  text-transform: uppercase;
}

.panel-title-gap {
  margin-top: 28px;
}

.category-list,
.symptom-list {
  display: grid;
  gap: 12px;
  margin-top: 14px;
}

.category-btn,
.symptom-btn {
  width: 100%;
  text-align: left;
  border: 0;
  cursor: pointer;
  font: inherit;
  transition: 180ms ease;
}

.category-btn {
  padding: 16px 18px;
  border-radius: 18px;
  background: transparent;
  color: #4d5550;
}

.category-btn.active {
  background: #fff;
  box-shadow: 0 12px 22px rgba(24, 33, 27, 0.08);
  color: var(--primary);
}

.category-btn strong,
.symptom-name {
  display: block;
  font-size: 18px;
}

.category-btn span,
.symptom-summary {
  display: block;
  margin-top: 6px;
  color: #738074;
  font-size: 14px;
  line-height: 1.5;
}

.symptom-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 16px 18px;
  border-radius: 18px;
  background: transparent;
}

.symptom-btn.active {
  background: #eaf3ec;
}

.symptom-arrow {
  font-size: 26px;
  color: #8c968d;
}

.plan-detail {
  padding: 42px;
  position: relative;
}

.therapy-badge {
  background: rgba(45, 91, 70, 0.1);
}

.plan-scene {
  margin-left: 12px;
  font-size: 15px;
}

.plan-title {
  margin: 24px 0 0;
  font-size: clamp(34px, 4vw, 54px);
  line-height: 1.04;
  letter-spacing: -0.03em;
}

.plan-desc {
  margin: 14px 0 0;
  font-size: 18px;
  max-width: 820px;
}

.detail-block {
  margin-top: 32px;
  padding: 24px;
  border-radius: 24px;
  background: #f7f8f5;
  border: 1px solid rgba(24, 33, 27, 0.06);
}

.detail-block h4 {
  margin: 0;
  font-size: 14px;
  color: #718171;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.point-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

.point-tag {
  padding: 12px 18px;
  border-radius: 16px;
  background: #fff;
  border: 1px solid rgba(24, 33, 27, 0.08);
  font-size: 16px;
  font-weight: 600;
}

.step-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 18px;
}

.step-card {
  min-height: 184px;
  padding: 16px;
  border-radius: 24px;
  border: 1px solid transparent;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
}

.step-card.blue {
  background: #edf5ff;
  border-color: #d4e4fb;
}

.step-card.cyan {
  background: #ebfbff;
  border-color: #cff3fb;
}

.step-card.red {
  background: #fff0eb;
  border-color: #ffd9cb;
}

.step-card.orange {
  background: #fff4e5;
  border-color: #ffdfb4;
}

.step-index {
  font-size: 13px;
  color: rgba(24, 33, 27, 0.55);
}

.step-icon {
  width: 62px;
  height: 62px;
  margin-top: 16px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.84);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  font-weight: 700;
}

.step-name {
  margin-top: 14px;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.45;
}

.notice-card {
  margin-top: 22px;
  padding: 22px 24px;
  border-radius: 22px;
  background: linear-gradient(180deg, #f3f8f4 0%, #edf5ef 100%);
  border: 1px solid rgba(93, 143, 110, 0.14);
}

.notice-card strong {
  display: block;
  margin-bottom: 6px;
  font-size: 15px;
}

.notice-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.footer {
  padding: 42px 0 20px;
  background: #16211b;
  color: rgba(244, 239, 225, 0.74);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1.2fr;
  gap: 28px;
  padding-bottom: 24px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-brand .brand-text {
  color: #fff;
}

.footer-copy {
  max-width: 480px;
}

.footer h4 {
  margin: 8px 0 16px;
  color: #fff;
  font-size: 18px;
}

.footer a {
  display: block;
  margin-top: 12px;
}

.footer a[href="#company"] {
  line-height: 1.9;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  padding-top: 18px;
  font-size: 14px;
}

.footer-icp,
.footer-icp a {
  color: rgba(255, 255, 255, 0.96);
  font-weight: 700;
}

@media (max-width: 1040px) {
  .hero-grid,
  .feature-grid,
  .company-card-grid,
  .plan-shell,
  .footer-grid {
    grid-template-columns: 1fr;
  }

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

  .plan-sidebar {
    border-right: 0;
    border-bottom: 1px solid rgba(24, 33, 27, 0.06);
  }
}

@media (max-width: 720px) {
  .container {
    width: min(100% - 28px, 1180px);
  }

  .nav {
    display: none;
  }

  .hero {
    padding-top: 72px;
  }

  .hero-actions,
  .footer-bottom {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }

  .plan-detail,
  .plan-sidebar {
    padding: 24px 20px;
  }

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

  .feature-card {
    padding: 28px 22px;
  }

  .company-card {
    padding: 24px 22px;
  }
}