:root {
  --bg: #f7fbfc;
  --ink: #0f172a;
  --muted: #64748b;
  --line: #dbe7ef;
  --card: #ffffff;
  --primary: #0f766e;
  --cyan: #06b6d4;
  --green: #10b981;
  --blue: #2563eb;
  --soft: #ecfeff;
  --shadow: 0 18px 48px rgba(15, 23, 42, .105);
  --shadow-soft: 0 10px 26px rgba(15, 23, 42, .07);
  --radius: 24px;
}

* { box-sizing: border-box; }
html {
  scroll-behavior: smooth;
  width: 100%;
  max-width: 100%;
  overflow-x: hidden;
}
body {
  margin: 0;
  width: 100%;
  max-width: 100%;
  min-height: 100%;
  min-height: -webkit-fill-available;
  overflow-x: hidden;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button, textarea, input { font: inherit; }
button { -webkit-tap-highlight-color: transparent; }

.page-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(circle at 8% 6%, rgba(34, 211, 238, .18), transparent 30%),
    radial-gradient(circle at 92% 8%, rgba(16, 185, 129, .14), transparent 28%),
    linear-gradient(180deg, #effafe 0%, #f8fafc 48%, #ffffff 100%);
}

.container {
  width: min(1040px, calc(100% - 48px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  padding-top: env(safe-area-inset-top);
  overflow: hidden;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  background: rgba(15, 23, 42, .82);
  border-bottom: 1px solid rgba(255,255,255,.10);
}
.header-inner {
  min-height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(10px, 1.6vw, 20px);
  padding: 6px 0;
}
.brand {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
}
.brand img { width: clamp(132px, 11vw, 158px); }
.nav {
  display: flex;
  flex: 1 1 auto;
  min-width: 0;
  max-width: 500px;
  justify-content: center;
  align-items: center;
  gap: clamp(8px, 1.25vw, 16px);
  color: rgba(255,255,255,.82);
  font-size: 13px;
  white-space: nowrap;
  overflow-x: auto;
  overflow-y: hidden;
  overscroll-behavior-x: contain;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.nav::-webkit-scrollbar { display: none; }
.nav a {
  flex: 0 0 auto;
  padding: 7px 0;
}
.nav a:hover { color: #fff; }
.header-cta {
  flex: 0 0 auto;
  padding: 9px 14px;
  border-radius: 999px;
  color: white;
  background: linear-gradient(135deg, var(--cyan), var(--green));
  font-weight: 800;
  font-size: 13px;
  box-shadow: 0 10px 20px rgba(6,182,212,.20);
}

.section { padding: 46px 0; }
.hero { padding: 30px 0 40px; }
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, .9fr) minmax(300px, .62fr);
  gap: 34px;
  align-items: center;
}
.hero-copy {
  max-width: 660px;
}
.eyebrow, .section-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--primary);
  font-weight: 900;
  letter-spacing: .025em;
  font-size: 12.5px;
}
.pulse-dot {
  width: 9px;
  height: 9px;
  border-radius: 999px;
  background: var(--green);
  box-shadow: 0 0 0 7px rgba(16,185,129,.14);
}
h1 {
  max-width: 620px;
  margin: 14px 0 12px;
  font-size: clamp(32px, 3.05vw, 43px);
  line-height: 1.08;
  letter-spacing: -0.044em;
  text-wrap: balance;
}
h2 {
  margin: 9px 0 12px;
  font-size: clamp(23px, 2.1vw, 31px);
  line-height: 1.16;
  letter-spacing: -0.035em;
  text-wrap: balance;
}
h3 {
  margin: 0 0 8px;
  font-size: 18px;
  letter-spacing: -.018em;
}
p {
  margin: 0;
  color: var(--muted);
  line-height: 1.68;
  font-size: 15px;
}
.hero-lead {
  max-width: 560px;
  font-size: 15.5px;
}
.hero-actions {
  display: flex;
  gap: 11px;
  margin: 20px 0;
  flex-wrap: wrap;
}
.btn {
  border: 0;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 17px;
  border-radius: 14px;
  font-weight: 900;
  font-size: 15px;
  transition: transform .18s ease, box-shadow .18s ease, opacity .18s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn.primary {
  color: white;
  background: linear-gradient(135deg, #2563eb, #06b6d4 48%, #10b981);
  box-shadow: 0 12px 24px rgba(37,99,235,.18);
}
.btn.secondary { color: white; background: #0f766e; }
.btn.ghost { color: #0f172a; background: rgba(255,255,255,.78); border: 1px solid rgba(15,23,42,.12); }

.hero-metrics {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.hero-metrics div {
  min-width: 98px;
  padding: 11px 13px;
  border-radius: 17px;
  background: rgba(255,255,255,.76);
  border: 1px solid rgba(15,23,42,.08);
  box-shadow: var(--shadow-soft);
}
.hero-metrics strong {
  display: block;
  font-size: 22px;
  line-height: 1.05;
}
.hero-metrics span {
  display: block;
  color: var(--muted);
  margin-top: 4px;
  font-size: 12px;
}

.app-shell {
  display: flex;
  justify-content: center;
}
.phone-card {
  width: min(100%, 340px);
  border-radius: 32px;
  padding: 15px;
  background: rgba(15, 23, 42, .92);
  box-shadow: var(--shadow);
  border: 1px solid rgba(255,255,255,.16);
}
.phone-top {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  color: rgba(255,255,255,.72);
  font-size: 12px;
  padding: 3px 3px 12px;
}
.phone-top strong {
  color: #fff;
  font-size: 14px;
}
.phone-top em {
  text-align: right;
  font-style: normal;
}
.score-card {
  padding: 20px;
  border-radius: 24px;
  color: #fff;
  background: linear-gradient(135deg, #0891b2, #10b981);
}
.score-card span {
  display: block;
  opacity: .78;
  font-weight: 800;
  font-size: 13px;
}
.score-card strong {
  display: block;
  font-size: 52px;
  line-height: 1;
  margin: 7px 0;
  letter-spacing: -.05em;
}
.score-card p {
  color: rgba(255,255,255,.86);
  font-size: 14px;
}
.mini-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 9px;
  margin: 10px 0;
}
.mini-grid div, .next-card {
  padding: 13px;
  border-radius: 17px;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.10);
  color: #fff;
}
.mini-grid span, .next-card span {
  display: block;
  color: rgba(255,255,255,.62);
  font-size: 11.5px;
  margin-bottom: 5px;
}
.mini-grid strong {
  display: block;
  font-size: 17px;
}
.next-card h3 {
  color: #fff;
  font-size: 17px;
}
.next-card p {
  color: rgba(255,255,255,.70);
  font-size: 13px;
}

.app-grid, .body-grid {
  display: grid;
  grid-template-columns: minmax(0, .74fr) minmax(330px, 1fr);
  gap: 24px;
  align-items: stretch;
}
.app-copy, .input-panel, .body-card, .body-copy, .result-report, .meal-card {
  border-radius: var(--radius);
  background: rgba(255,255,255,.82);
  border: 1px solid rgba(15,23,42,.08);
  box-shadow: var(--shadow-soft);
}
.app-copy, .input-panel, .body-card, .body-copy {
  padding: 24px;
}
.app-copy p {
  max-width: 420px;
}
.quick-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 18px;
}
.quick-tags button {
  border: 1px solid #cbd5e1;
  background: #fff;
  color: #0f172a;
  border-radius: 999px;
  padding: 9px 12px;
  font-weight: 800;
  cursor: pointer;
  font-size: 14px;
}
.field-label {
  display: block;
  margin: 0 0 9px;
  color: #0f172a;
  font-weight: 900;
  font-size: 14px;
}
.smart-textarea {
  width: 100%;
  resize: vertical;
  min-height: 172px;
  border: 1px solid #cbd5e1;
  outline: none;
  border-radius: 18px;
  padding: 14px;
  color: #0f172a;
  background: #f8fafc;
  line-height: 1.62;
  font-size: 14.5px;
}
.smart-textarea:focus {
  border-color: rgba(6,182,212,.8);
  box-shadow: 0 0 0 4px rgba(6,182,212,.12);
}
.demo-actions {
  display: flex;
  gap: 10px;
  margin-top: 12px;
  flex-wrap: wrap;
}
.result-report {
  margin-top: 22px;
  padding: 22px;
}
.empty-state {
  color: var(--muted);
  text-align: center;
  padding: 26px 12px;
  font-weight: 700;
}
.score-hero {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 18px;
  align-items: center;
}
.score-ring {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background:
    conic-gradient(#10b981 var(--score-deg), #e2e8f0 0),
    #fff;
  box-shadow: inset 0 0 0 10px #fff;
}
.score-ring strong {
  font-size: 30px;
}
.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0;
}
.tag {
  border-radius: 999px;
  padding: 7px 10px;
  background: #ecfeff;
  color: #0f766e;
  font-weight: 800;
  font-size: 12.5px;
}
.insight-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
.insight-card {
  padding: 15px;
  border-radius: 17px;
  background: #f8fafc;
  border: 1px solid #e2e8f0;
}
.insight-card strong {
  display: block;
  margin-bottom: 7px;
  font-size: 14px;
}
.insight-card p {
  font-size: 13.5px;
}

.body-title {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 16px;
}
.body-title span {
  color: var(--primary);
  font-weight: 900;
  font-size: 14px;
}
.body-title strong {
  color: var(--ink);
  font-size: 14px;
}
.metric-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}
.metric-grid div {
  padding: 15px;
  border-radius: 18px;
  background: #f8fafc;
  border: 1px solid #e2e8f0;
}
.metric-grid span, .metric-grid em {
  display: block;
  color: var(--muted);
  font-size: 12.5px;
  font-style: normal;
}
.metric-grid strong {
  display: block;
  margin: 5px 0;
  font-size: 25px;
  letter-spacing: -.04em;
}
.priority-list {
  display: grid;
  gap: 10px;
  margin-top: 16px;
}
.priority-list div, .plan-list div {
  display: grid;
  grid-template-columns: 76px 1fr;
  gap: 10px;
  padding: 14px;
  border-radius: 17px;
  background: #f8fafc;
  border: 1px solid #e2e8f0;
}
.priority-list strong, .plan-list strong {
  color: var(--primary);
  font-size: 14px;
}
.priority-list span, .plan-list span {
  color: var(--muted);
  line-height: 1.55;
  font-size: 14px;
}

.section-head {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 24px;
}
.plan-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}
.plan-list div {
  grid-template-columns: 1fr;
  background: #fff;
  box-shadow: var(--shadow-soft);
}

.meal-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 15px;
}
.meal-card {
  padding: 22px;
}
.meal-card span {
  display: inline-flex;
  color: var(--primary);
  font-weight: 900;
  margin-bottom: 10px;
  font-size: 14px;
}
.meal-card h3 {
  min-height: 48px;
}

.site-footer {
  padding: 28px 0 calc(28px + env(safe-area-inset-bottom));
  background: #0f172a;
  color: rgba(255,255,255,.8);
}
.footer-grid {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}
.site-footer img {
  width: 132px;
  margin-bottom: 7px;
}
.site-footer p {
  color: rgba(255,255,255,.62);
  font-size: 13px;
}
.site-footer a {
  font-weight: 900;
  color: #fff;
  font-size: 14px;
}

@media (min-width: 1280px) {
  h1 { font-size: 42px; }
  h2 { font-size: 30px; }
}

@media (max-width: 980px) {
  .hero-grid, .app-grid, .body-grid {
    grid-template-columns: 1fr;
  }
  .app-shell {
    justify-content: flex-start;
  }
  .plan-list {
    grid-template-columns: repeat(2, 1fr);
  }
  .insight-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 680px) {
  .container {
    width: min(100% - 28px, 430px);
  }
  .site-header {
    padding-top: max(env(safe-area-inset-top), 0px);
  }
  .header-inner {
    min-height: auto;
    padding: 10px 0 8px;
    gap: 8px;
    flex-wrap: wrap;
  }
  .brand {
    width: 100%;
    justify-content: center;
  }
  .brand img {
    width: 142px;
  }
  .nav {
    order: 2;
    flex: 0 0 100%;
    width: 100%;
    max-width: 100%;
    justify-content: flex-start;
    gap: 7px;
    padding: 0 2px 2px;
  }
  .nav a {
    font-size: 12px;
    padding: 7px 10px;
    border-radius: 999px;
    background: rgba(255,255,255,.08);
  }
  .header-cta {
    display: none;
  }
  .section {
    padding: 42px 0;
  }
  .hero {
    padding: 28px 0 34px;
  }
  h1 {
    font-size: clamp(31px, 8.4vw, 38px);
    line-height: 1.08;
    letter-spacing: -.043em;
  }
  h2 {
    font-size: clamp(23px, 6vw, 30px);
  }
  p, .hero-lead {
    font-size: 14.5px;
  }
  .hero-actions .btn {
    width: calc(50% - 6px);
    padding: 12px 9px;
  }
  .hero-metrics {
    gap: 9px;
  }
  .hero-metrics div {
    flex: 1 1 30%;
    min-width: 0;
    padding: 10px 9px;
  }
  .hero-metrics strong {
    font-size: 20px;
  }
  .hero-metrics span {
    font-size: 11.5px;
  }
  .app-shell {
    margin-top: 18px;
  }
  .phone-card {
    width: 100%;
    border-radius: 28px;
    padding: 13px;
  }
  .score-card {
    border-radius: 22px;
    padding: 18px;
  }
  .score-card strong {
    font-size: 48px;
  }
  .mini-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .app-copy, .input-panel, .body-card, .body-copy, .result-report, .meal-card {
    padding: 18px;
    border-radius: 22px;
  }
  .smart-textarea {
    min-height: 178px;
    border-radius: 17px;
  }
  .demo-actions .btn {
    width: 100%;
  }
  .score-hero {
    grid-template-columns: 1fr;
  }
  .score-ring {
    width: 96px;
    height: 96px;
  }
  .body-title {
    display: block;
  }
  .body-title strong {
    display: block;
    margin-top: 6px;
  }
  .metric-grid, .meal-grid, .plan-list {
    grid-template-columns: 1fr;
  }
  .priority-list div, .plan-list div {
    grid-template-columns: 72px 1fr;
    padding: 14px;
  }
  .plan-list div {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    display: block;
  }
  .site-footer a {
    display: inline-flex;
    margin-top: 14px;
  }
}

@media (max-width: 390px) {
  .container {
    width: calc(100% - 24px);
  }
  h1 {
    font-size: 30px;
  }
  .hero-actions {
    gap: 10px;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .hero-metrics {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
  }
  .mini-grid {
    gap: 8px;
  }
  .mini-grid div, .next-card {
    padding: 12px;
  }
  .metric-grid div {
    padding: 14px;
  }
}