:root {
  --c-bg: #F7F5F2;
  --c-surface: #FFFFFF;
  --c-primary: #0D3B4C;
  --c-primary-light: #E8F1F4;
  --c-secondary: #B85C3E;
  --c-accent: #C99E5A;
  --c-text: #1A1A1A;
  --c-text2: #6B6B6B;
  --c-text3: #9E9E98;
  --c-border: #E8E5E0;
  --c-border2: #D8D4CC;

  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 16px;
  --r-xl: 24px;

  --shadow-card: 0 4px 20px rgba(0,0,0,.05), 0 1px 3px rgba(0,0,0,.03);
  --shadow-btn: 0 4px 14px rgba(13,59,76,.22);

  --font-serif: 'Noto Serif SC', Georgia, serif;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;

  --safe-top: env(safe-area-inset-top, 0);
  --safe-bottom: env(safe-area-inset-bottom, 0);
}

*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; }
body {
  font-family:var(--font-sans);
  background:var(--c-bg);
  color:var(--c-text);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a { color:inherit; text-decoration:none; }
img { max-width:100%; display:block; }

/* ---- buttons ---- */
.btn {
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  padding:14px 28px; border-radius:var(--r-md); font-size:15px; font-weight:600;
  cursor:pointer; transition:all .25s ease; border:none; font-family:inherit;
}
.btn-primary {
  background:var(--c-primary); color:#fff;
  box-shadow:var(--shadow-btn);
}
.btn-primary:hover { background:#092B38; transform:translateY(-2px); box-shadow:0 6px 20px rgba(13,59,76,.28); }
.btn-secondary {
  background:var(--c-surface); color:var(--c-primary);
  border:1px solid var(--c-border2);
}
.btn-secondary:hover { background:var(--c-primary-light); border-color:var(--c-primary); }
.btn-sm { padding:8px 18px; font-size:14px; }
.btn-ghost {
  background:transparent; color:var(--c-primary);
  border:1px solid var(--c-border2);
}
.btn-ghost:hover { background:rgba(13,59,76,.06); border-color:var(--c-primary); }

/* ---- header ---- */
.header {
  position:fixed; top:0; left:0; right:0; z-index:100;
  background:rgba(247,245,242,.75);
  backdrop-filter:blur(20px) saturate(160%);
  -webkit-backdrop-filter:blur(20px) saturate(160%);
  border-bottom:1px solid transparent;
  transition:border-color .25s, background .25s;
}
.header.scrolled {
  border-bottom-color:var(--c-border);
  background:rgba(247,245,242,.92);
}
.header-inner {
  max-width:1200px; margin:0 auto;
  padding:14px 24px; padding-top:calc(14px + var(--safe-top));
  display:flex; align-items:center; justify-content:space-between;
}
.logo {
  display:flex; align-items:center; gap:10px;
  font-family:var(--font-serif); font-weight:700; font-size:20px;
  color:var(--c-primary); letter-spacing:1px;
}
.logo-mark {
  width:34px; height:34px; display:flex; align-items:center; justify-content:center;
  background:var(--c-primary); color:#fff; border-radius:var(--r-sm); font-size:18px;
}

/* ============================
   HERO
   ============================ */
.hero {
  position:relative;
  min-height:100vh; min-height:100dvh;
  display:flex; align-items:center;
  padding:100px 24px 64px;
  background:var(--c-bg);
  overflow:hidden;
}
.hero-bg {
  position:absolute; inset:0; z-index:0;
}
.hero-bg picture, .hero-bg img {
  width:100%; height:100%; object-fit:cover;
}
.hero-bg-mask {
  position:absolute; inset:0;
  background:linear-gradient(90deg,
    rgba(247,245,242,.97) 0%,
    rgba(247,245,242,.85) 40%,
    rgba(247,245,242,.45) 70%,
    rgba(247,245,242,.2) 100%
  );
}
.hero-body {
  position:relative; z-index:2;
  max-width:1200px; margin:0 auto; width:100%;
  display:grid; grid-template-columns:1.15fr 0.85fr;
  gap:48px; align-items:center;
}
.hero-text { max-width:560px; }
.hero-tag {
  display:inline-block;
  font-size:13px; font-weight:600; color:var(--c-secondary);
  background:rgba(184,92,62,.09); padding:6px 14px;
  border-radius:100px; margin-bottom:20px; letter-spacing:.5px;
}
.hero-text h1 {
  font-family:var(--font-serif);
  font-size:clamp(32px,5vw,54px); font-weight:700;
  line-height:1.22; color:var(--c-text); margin-bottom:20px;
}
.hero-text h1 span { color:var(--c-primary); }
.hero-desc {
  font-size:16px; color:var(--c-text2); line-height:1.75;
  margin-bottom:32px; max-width:460px;
}
.hero-actions {
  display:flex; gap:14px; margin-bottom:40px;
}
.hero-points {
  display:flex; gap:36px;
}
.point { display:flex; flex-direction:column; gap:4px; }
.point strong { font-size:17px; font-weight:700; color:var(--c-primary); }
.point span { font-size:13px; color:var(--c-text3); }

/* phone mockup */
.hero-phone {
  display:flex; justify-content:center;
}
.phone-frame {
  width:280px; height:560px;
  background:var(--c-surface);
  border-radius:36px; box-shadow:0 12px 40px rgba(0,0,0,.08);
  padding:10px;
}
.phone-screen {
  width:100%; height:100%;
  background:var(--c-bg); border-radius:28px;
  padding:18px 14px; display:flex; flex-direction:column; gap:12px;
}
.phone-head {
  display:flex; justify-content:space-between; align-items:center;
  padding-bottom:10px; border-bottom:1px solid var(--c-border);
}
.phone-head span:first-child { font-family:var(--font-serif); font-weight:700; color:var(--c-primary); font-size:13px; }
.phone-head span:last-child { font-size:11px; color:var(--c-text3); font-weight:600; }
.phone-card {
  background:var(--c-surface); border:1px solid var(--c-border);
  border-radius:var(--r-md); padding:14px;
}
.phone-card-sm { padding:12px; }
.phone-card-row {
  display:flex; align-items:center; gap:10px; margin-bottom:12px;
}
.phone-avatar {
  width:32px; height:32px; border-radius:var(--r-sm);
  background:var(--c-primary-light); color:var(--c-primary);
  display:flex; align-items:center; justify-content:center;
  font-weight:700; font-size:13px; flex-shrink:0;
}
.phone-card-title { font-weight:700; font-size:13px; color:var(--c-text); margin-bottom:2px; }
.phone-card-sub { font-size:11px; color:var(--c-text3); }
.phone-bar {
  height:6px; background:#EFECE8; border-radius:100px;
  display:flex; overflow:hidden; margin-bottom:6px;
}
.phone-bar-a { background:var(--c-primary); }
.phone-bar-b { background:var(--c-secondary); }
.phone-bar-labels {
  display:flex; justify-content:space-between;
  font-size:10px; color:var(--c-text3); font-weight:500;
}
.phone-card-sm p { font-size:12px; color:var(--c-text2); line-height:1.5; margin-bottom:6px; }
.phone-card-sm span { font-size:10px; color:var(--c-text3); }

/* ============================
   SECTIONS shared
   ============================ */
.section-inner {
  max-width:1200px; margin:0 auto; padding:90px 24px;
}
.sec-tag {
  display:inline-block;
  font-size:13px; font-weight:600; color:var(--c-accent);
  background:rgba(201,158,90,.1); padding:6px 14px;
  border-radius:100px; margin-bottom:18px; letter-spacing:.5px;
}
.section-inner h2 {
  font-family:var(--font-serif);
  font-size:clamp(26px,4vw,40px); font-weight:700;
  line-height:1.3; color:var(--c-text); margin-bottom:44px;
}

/* ============================
   FEATURES
   ============================ */
.features {
  position:relative;
  background:var(--c-surface);
  border-top:1px solid var(--c-border);
  border-bottom:1px solid var(--c-border);
  overflow:hidden;
}
.features-tex {
  position:absolute; inset:0; z-index:0;
  opacity:.45; background-size:480px; background-repeat:repeat;
  pointer-events:none; mix-blend-mode:multiply;
}
.features .section-inner { position:relative; z-index:1; }
.features-grid {
  display:grid; grid-template-columns:repeat(3,1fr); gap:20px;
}
.feat-card {
  position:relative;
  padding:28px 32px;
  background:var(--c-bg);
  border:1px solid var(--c-border);
  border-radius:var(--r-lg);
  transition:transform .3s ease, box-shadow .3s ease, border-color .3s ease;
  overflow:hidden;
}
.feat-card::after {
  content:''; position:absolute; top:0; left:-100%; width:50%; height:100%;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.35),transparent);
  transform:skewX(-20deg); transition:left .6s ease; pointer-events:none;
}
.feat-card:hover { transform:translateY(-6px); box-shadow:var(--shadow-card); border-color:var(--c-border2); }
.feat-card:hover::after { left:150%; }
.feat-icon {
  width:44px; height:44px; display:flex; align-items:center; justify-content:center;
  background:var(--c-surface); border:1px solid var(--c-border);
  border-radius:var(--r-md); font-size:20px; margin-bottom:16px;
}
.feat-card h3 { font-size:17px; font-weight:700; color:var(--c-text); margin-bottom:8px; }
.feat-card p { font-size:14px; color:var(--c-text2); line-height:1.65; }

/* ============================
   HOW
   ============================ */
.how { background:var(--c-bg); }
.how-ill {
  margin-bottom:40px; border-radius:var(--r-lg);
  overflow:hidden; border:1px solid var(--c-border);
}
.how-ill img { width:100%; height:auto; }
.steps {
  display:flex; align-items:flex-start; gap:24px;
}
.step {
  flex:1; padding:32px;
  background:var(--c-surface);
  border:1px solid var(--c-border);
  border-radius:var(--r-lg);
}
.step-num {
  display:block;
  font-family:var(--font-serif); font-size:34px; font-weight:700;
  color:rgba(13,59,76,.14); margin-bottom:14px; line-height:1;
}
.step h3 { font-size:19px; font-weight:700; color:var(--c-text); margin-bottom:8px; }
.step p { font-size:14px; color:var(--c-text2); line-height:1.65; }
.step-arrow {
  flex-shrink:0; align-self:center;
  font-size:28px; color:var(--c-accent); font-weight:300;
}

/* ============================
   DOWNLOAD
   ============================ */
.download {
  position:relative;
  background:var(--c-primary);
  color:#fff; overflow:hidden;
}
.download-bg {
  position:absolute; inset:0; z-index:0;
  background-size:cover; background-position:center;
  opacity:.35; mix-blend-mode:soft-light;
}
.download .section-inner { position:relative; z-index:1; text-align:center; }
.sec-tag-inv { background:rgba(255,255,255,.12); color:var(--c-accent); }
.download .section-inner h2 { color:#fff; margin-bottom:20px; }
.download-desc {
  font-size:16px; color:rgba(255,255,255,.72);
  max-width:500px; margin:0 auto 36px; line-height:1.7;
}
.download-btn {
  display:inline-flex !important;
  background:#fff !important; color:var(--c-primary) !important;
  box-shadow:0 4px 14px rgba(0,0,0,.12) !important;
  font-size:16px !important; padding:16px 36px !important;
  animation:pulse-glow 2.4s ease-in-out infinite;
}
.download-btn:hover { background:var(--c-bg) !important; animation:none; }
.download-meta {
  margin-top:16px; font-size:13px; color:rgba(255,255,255,.45);
}

@keyframes pulse-glow {
  0%,100% { box-shadow:0 4px 14px rgba(0,0,0,.12); }
  50% { box-shadow:0 4px 24px rgba(255,255,255,.35), 0 0 0 4px rgba(255,255,255,.08); }
}

/* ============================
   FOOTER
   ============================ */
.footer {
  background:var(--c-surface);
  border-top:1px solid var(--c-border);
}
.footer-inner {
  max-width:1200px; margin:0 auto; padding:44px 24px;
  display:flex; align-items:center; justify-content:space-between; gap:20px;
}
.footer-brand {
  display:flex; align-items:center; gap:10px;
  font-family:var(--font-serif); font-weight:700; font-size:17px; color:var(--c-primary);
}
.footer-inner > p { font-size:13px; color:var(--c-text3); }
.footer-links { display:flex; gap:20px; }
.footer-links a { font-size:14px; color:var(--c-text2); transition:color .2s; }
.footer-links a:hover { color:var(--c-primary); }

/* ============================
   REVEAL ANIMATION
   ============================ */
.reveal {
  opacity:0; transform:translateY(24px);
  transition:opacity .6s ease, transform .6s ease;
}
.reveal.visible { opacity:1; transform:translateY(0); }
.how-ill.reveal {
  opacity:0; transform:translateY(24px) scale(.98);
  transition:opacity .7s ease, transform .7s ease;
}
.how-ill.reveal.visible { opacity:1; transform:translateY(0) scale(1); }

@media (prefers-reduced-motion:reduce) {
  *,*::before,*::after {
    animation-duration:.01ms !important; animation-iteration-count:1 !important;
    transition-duration:.01ms !important; scroll-behavior:auto !important;
  }
}

/* ============================
   RESPONSIVE — Tablet
   ============================ */
@media (max-width:1024px) {
  .hero-body {
    grid-template-columns:1fr;
    text-align:center;
    gap:36px;
  }
  .hero-text { max-width:100%; }
  .hero-desc { margin-left:auto; margin-right:auto; }
  .hero-actions { justify-content:center; }
  .hero-points { justify-content:center; }
  .hero-phone { order:-1; }
  .phone-frame { width:220px; height:440px; }
  .features-grid { grid-template-columns:repeat(2,1fr); }
}

/* ============================
   RESPONSIVE — Mobile
   ============================ */
@media (max-width:768px) {
  .header-inner { padding:12px 16px; }

  /* hero mobile — vert image → top-down text overlay */
  .hero {
    min-height:auto;
    padding:0 0 48px;
    flex-direction:column;
    align-items:stretch;
  }
  .hero-bg {
    position:relative;
    width:100%; height:75vh; height:75dvh;
  }
  .hero-bg-mask {
    background:linear-gradient(180deg,
      rgba(247,245,242,0) 40%,
      rgba(247,245,242,.6) 70%,
      rgba(247,245,242,.95) 90%,
      var(--c-bg) 100%
    );
  }
  .hero-body {
    grid-template-columns:1fr;
    text-align:center;
    padding:0 16px;
    gap:0;
    margin-top:-28px;
  }
  .hero-text h1 { font-size:28px; }
  .hero-desc { font-size:15px; max-width:100%; }
  .hero-actions { flex-direction:column; align-items:stretch; }
  .hero-points { justify-content:center; gap:24px; }
  .hero-phone { display:none; }

  .section-inner { padding:64px 16px; }
  .section-inner h2 { margin-bottom:32px; }
  .features-grid { grid-template-columns:1fr; }
  .features-tex { background-size:280px; opacity:.3; }

  .how-ill { margin-bottom:28px; }
  .steps { flex-direction:column; gap:20px; }
  .step-arrow { transform:rotate(90deg); align-self:center; }

  .download-btn { width:100%; justify-content:center; }

  .footer-inner { flex-direction:column; text-align:center; gap:14px; }
}