/* ===== RESET & BASE ===== */
*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }
:root {
  --red: #E63946;
  --red-dark: #C92A38;
  --red-light: #FFE8EA;
  --navy: #1B3A5B;
  --navy-light: #2D5A82;
  --gold: #F4A261;
  --gold-light: #FFF4E6;
  --teal: #2A9D8F;
  --teal-light: #E0F5F2;
  --gray-50: #FAFAF8;
  --gray-100: #F4F3EE;
  --gray-200: #E8E6DF;
  --gray-300: #D1CFC6;
  --gray-500: #8B8880;
  --gray-700: #4A4843;
  --gray-900: #1A1815;
  --white: #FFFFFF;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 4px 20px rgba(0,0,0,0.06);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.1);
  --font: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", "Noto Sans SC", sans-serif;
}
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: var(--font); background: var(--gray-50); color: var(--gray-900); line-height: 1.7; overflow-x: hidden; }
a { text-decoration: none; }
/* 键盘焦点可见性（无障碍） */
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible, .nav-mobile-toggle:focus-visible { outline: 2px solid var(--gold); outline-offset: 2px; border-radius: 6px; }

/* ===== NAV (shared) ===== */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(255,255,255,0.92); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--gray-200); padding: 0 24px; transition: all .3s;
}
.nav-inner { max-width: 1200px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; height: 64px; }
.nav-logo { font-size: 18px; font-weight: 800; color: var(--red); letter-spacing: 1px; white-space: nowrap; cursor: pointer; }
.nav-logo span { color: var(--navy); font-size: 14px; font-weight: 400; margin-left: 6px; }
.nav-links { display: flex; gap: 4px; list-style: none; }
.nav-links a { font-size: 13px; color: var(--gray-700); padding: 8px 12px; border-radius: 8px; transition: all .2s; white-space: nowrap; }
.nav-links a:hover { color: var(--red); background: var(--red-light); }
.nav-cta { font-size: 13px; font-weight: 600; color: #fff; background: var(--red); padding: 8px 18px; border-radius: 8px; cursor: pointer; transition: all .2s; white-space: nowrap; }
.nav-cta:hover { background: var(--red-dark); transform: translateY(-1px); }
.nav-mobile-toggle { display: none; font-size: 24px; background: none; border: none; cursor: pointer; color: var(--gray-900); }

/* ===== HERO (home) ===== */
.hero {
  min-height: 100dvh; display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, #1B3A5B 0%, #2D5A82 50%, #1B3A5B 100%);
  position: relative; overflow: hidden; padding: 80px 24px 60px;
}
.hero::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(circle at 30% 20%, rgba(230,57,70,0.12) 0%, transparent 50%),
              radial-gradient(circle at 70% 80%, rgba(244,162,97,0.1) 0%, transparent 50%);
}
.hero-deco { position: absolute; border-radius: 50%; opacity: 0.06; background: #fff; }
.hero-deco.d1 { width: 400px; height: 400px; top: -100px; right: -100px; }
.hero-deco.d2 { width: 250px; height: 250px; bottom: -50px; left: -80px; }
.hero-deco.d3 { width: 120px; height: 120px; top: 40%; right: 10%; }
.hero-content { position: relative; z-index: 2; text-align: center; max-width: 900px; }
.hero-badge { display: inline-block; font-size: 13px; color: var(--gold); border: 1px solid rgba(244,162,97,0.4); border-radius: 30px; padding: 6px 20px; margin-bottom: 24px; letter-spacing: 2px; }
.hero h1 { font-size: clamp(36px, 6vw, 60px); color: #fff; font-weight: 800; letter-spacing: 2px; margin-bottom: 12px; }
.hero h1 .accent { color: var(--gold); }
.hero-sub { font-size: clamp(16px, 2.5vw, 22px); color: rgba(255,255,255,0.8); margin-bottom: 40px; font-weight: 300; }
.hero-numbers { display: flex; justify-content: center; gap: clamp(16px, 4vw, 48px); margin-bottom: 40px; flex-wrap: wrap; }
.hero-num { text-align: center; }
.hero-num .big { font-size: clamp(32px, 5vw, 48px); font-weight: 800; color: #fff; line-height: 1; }
.hero-num .label { font-size: 12px; color: rgba(255,255,255,0.6); margin-top: 8px; letter-spacing: 1px; }
.hero-num .divider { width: 1px; height: 50px; background: rgba(255,255,255,0.15); }
.hero-cta-group { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.hero-btn { font-size: 15px; font-weight: 600; padding: 14px 36px; border-radius: 30px; display: inline-flex; align-items: center; gap: 8px; transition: all .3s; }
.hero-btn.primary { background: var(--red); color: #fff; box-shadow: 0 4px 20px rgba(230,57,70,0.3); }
.hero-btn.primary:hover { background: var(--red-dark); transform: translateY(-2px); box-shadow: 0 8px 30px rgba(230,57,70,0.4); }
.hero-btn.ghost { border: 1px solid rgba(255,255,255,0.3); color: #fff; }
.hero-btn.ghost:hover { border-color: #fff; background: rgba(255,255,255,0.08); }
.hero-scroll { position: absolute; bottom: 24px; left: 50%; transform: translateX(-50%); color: rgba(255,255,255,0.4); font-size: 13px; animation: bounce 2s infinite; }
@keyframes bounce { 0%,100% { transform: translate(-50%,0); } 50% { transform: translate(-50%,-8px); } }

/* ===== SECTION GENERIC ===== */
.section { padding: 80px 24px; }
.section-inner { max-width: 1200px; margin: 0 auto; }
.section-header { text-align: center; margin-bottom: 56px; }
.section-tag { font-size: 13px; color: var(--red); font-weight: 600; letter-spacing: 2px; margin-bottom: 12px; }
.section-title { font-size: clamp(28px, 4vw, 40px); font-weight: 800; color: var(--gray-900); margin-bottom: 12px; }
.section-desc { font-size: 15px; color: var(--gray-500); max-width: 600px; margin: 0 auto; }

/* ===== HOME: Section Cards Grid ===== */
.home-section { padding: 80px 24px; }
.home-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; }
.home-grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; margin-top: 28px; }
.home-card {
  background: #fff; border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--gray-200); transition: all .3s; cursor: pointer;
  position: relative; display: flex; flex-direction: column;
}
.home-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--red-light); }
.home-card-top { height: 8px; }
.home-card.c1 .home-card-top { background: var(--red); }
.home-card.c2 .home-card-top { background: var(--gold); }
.home-card.c3 .home-card-top { background: var(--teal); }
.home-card.c4 .home-card-top { background: var(--navy); }
.home-card.c5 .home-card-top { background: var(--navy-light); }
.home-card.c6 .home-card-top { background: #6B5B95; }
.home-card.c7 .home-card-top { background: #D4654A; }
.home-card.c8 .home-card-top { background: #2D5A82; }
.home-card-body { padding: 36px 28px; flex: 1; display: flex; flex-direction: column; }
.home-card-icon { font-size: 42px; margin-bottom: 18px; }
.home-card-body h3 { font-size: 20px; font-weight: 700; color: var(--gray-900); margin-bottom: 10px; }
.home-card-body p { font-size: 14px; color: var(--gray-500); line-height: 1.7; flex: 1; }
.home-card-link { margin-top: 16px; font-size: 14px; font-weight: 600; color: var(--red); display: flex; align-items: center; gap: 4px; transition: gap .2s; }
.home-card:hover .home-card-link { gap: 8px; }

/* ===== HOME: CTA Banner ===== */
.home-cta-banner {
  background: linear-gradient(135deg, var(--red), var(--red-dark));
  border-radius: var(--radius); padding: 56px 40px; text-align: center; margin: 0 24px;
}
.home-cta-banner h2 { color: #fff; font-size: 28px; margin-bottom: 12px; }
.home-cta-banner p { color: rgba(255,255,255,0.8); font-size: 16px; margin-bottom: 28px; }
.home-cta-banner .price-tag { display: inline-block; background: rgba(255,255,255,0.15); border: 1px solid rgba(255,255,255,0.3); border-radius: 30px; padding: 8px 24px; font-size: 14px; color: #fff; margin-bottom: 24px; }

/* ===== DETAIL PAGE HERO ===== */
.detail-hero {
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-light) 100%);
  padding: 120px 24px 60px; text-align: center; position: relative; overflow: hidden;
}
.detail-hero::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(circle at 70% 30%, rgba(230,57,70,0.1) 0%, transparent 50%);
}
.detail-hero-content { position: relative; z-index: 2; max-width: 800px; margin: 0 auto; }
.detail-tag { font-size: 13px; color: var(--gold); font-weight: 600; letter-spacing: 2px; margin-bottom: 12px; }
.detail-hero h1 { color: #fff; font-size: clamp(28px, 4vw, 40px); font-weight: 800; margin-bottom: 12px; }
.detail-hero p { color: rgba(255,255,255,0.7); font-size: 16px; }

/* ===== PAIN POINTS ===== */
.pain-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
/* 四大痛点：要么一行 4 列，要么一列 1 个，避免 3+1 排版 */
.pain-grid.pain-four { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 991px) {
  .pain-grid.pain-four { grid-template-columns: 1fr; }
}
/* 孩子层：5 列横排（紧凑布局） */
.pain-grid.kids { grid-template-columns: repeat(5, 1fr); gap: 14px; }
/* 父母层：3 列横排 */
.pain-grid.parents { grid-template-columns: repeat(3, 1fr); gap: 18px; }
/* 孩子层卡片紧凑样式 */
.pain-grid.kids .pain-card { padding: 18px 14px; }
.pain-grid.kids .pain-card h3 { font-size: 17px; margin-bottom: 6px; }
.pain-grid.kids .pain-icon { font-size: 26px; margin-bottom: 8px; }
.pain-grid.kids .pain-desc { font-size: 13px; line-height: 1.5; }
.pain-grid.kids .pain-stars { font-size: 13px; margin-bottom: 6px; }
.pain-grid.kids .pain-level { font-size: 11px; padding: 2px 8px; }
.pain-card { background: var(--gray-50); border: 1px solid var(--gray-200); border-radius: var(--radius); padding: 28px 24px; transition: all .3s; position: relative; overflow: hidden; }
.pain-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: var(--red); transform: scaleX(0); transform-origin: left; transition: transform .3s; }
.pain-card:hover { border-color: var(--red-light); box-shadow: var(--shadow-lg); transform: translateY(-4px); }
.pain-card:hover::before { transform: scaleX(1); }
.pain-icon { font-size: 28px; margin-bottom: 12px; }
.pain-card h3 { font-size: 18px; font-weight: 700; color: var(--gray-900); margin-bottom: 8px; }
.pain-target { display: inline-block; font-size: 11px; padding: 2px 10px; border-radius: 20px; margin-bottom: 12px; }
.pain-target.child { background: var(--teal-light); color: var(--teal); }
.pain-target.parent { background: var(--gold-light); color: var(--gold); }
.pain-stars { font-size: 14px; margin-bottom: 10px; }
.pain-stars .filled { color: var(--red); }
.pain-stars .empty { color: var(--gray-300); }
.pain-desc { font-size: 13px; color: var(--gray-500); line-height: 1.6; }
.pain-level { position: absolute; top: 16px; right: 16px; font-size: 10px; padding: 2px 8px; border-radius: 4px; font-weight: 600; }
.pain-level.extreme { background: var(--red-light); color: var(--red); }
.pain-level.high { background: var(--gold-light); color: var(--gold); }
.pain-level.mid { background: var(--teal-light); color: var(--teal); }

/* ===== GROWTH STAGES ===== */
.stage-timeline { display: flex; gap: 0; overflow-x: auto; padding-bottom: 8px; }
.stage-card { flex: 1; min-width: 240px; background: #fff; border-radius: var(--radius); padding: 32px 28px; position: relative; border: 1px solid var(--gray-200); transition: all .3s; }
.stage-card:not(:last-child)::after { content: '→'; position: absolute; right: -16px; top: 50%; transform: translateY(-50%); font-size: 24px; color: var(--gray-300); z-index: 2; }
.stage-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }
.stage-num { font-size: 12px; color: var(--gray-300); font-weight: 700; margin-bottom: 8px; }
.stage-period { font-size: 13px; color: var(--red); font-weight: 600; margin-bottom: 4px; }
.stage-card h3 { font-size: 20px; font-weight: 700; color: var(--gray-900); margin-bottom: 12px; }
.stage-mission { font-size: 14px; color: var(--navy); font-weight: 600; margin-bottom: 12px; padding: 8px 12px; background: var(--gray-50); border-radius: 8px; }
.stage-slogan { font-size: 13px; color: var(--gray-500); line-height: 1.6; }

/* ===== THEORIES ===== */
.theory-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-bottom: 40px; }
.theory-card { border-radius: var(--radius); padding: 32px 28px; text-align: center; transition: all .3s; }
.theory-card.t1 { background: linear-gradient(135deg, #FFF4E6, #FFE8CC); }
.theory-card.t2 { background: linear-gradient(135deg, #E0F5F2, #C5EDE7); }
.theory-card.t3 { background: linear-gradient(135deg, #FFE8EA, #FFD1D6); }
.theory-card.t4 { background: linear-gradient(135deg, #E8EDF5, #D1DAE8); }
.theory-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.theory-icon { font-size: 36px; margin-bottom: 16px; }
.theory-card h3 { font-size: 16px; font-weight: 700; margin-bottom: 8px; }
.theory-tag { display: inline-block; font-size: 11px; padding: 3px 12px; border-radius: 20px; margin-bottom: 12px; font-weight: 600; }
.theory-tag.t1 { background: rgba(244,162,97,0.2); color: #B8732E; }
.theory-tag.t2 { background: rgba(42,157,143,0.2); color: #1A6B62; }
.theory-tag.t3 { background: rgba(230,57,70,0.15); color: var(--red-dark); }
.theory-tag.t4 { background: rgba(27,58,91,0.15); color: var(--navy); }
.theory-slogan { font-size: 13px; color: var(--gray-700); line-height: 1.6; }
.theory-details { background: var(--gray-50); border: 1px solid var(--gray-200); border-radius: var(--radius); padding: 32px; display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.theory-detail h4 { font-size: 16px; font-weight: 700; color: var(--navy); margin-bottom: 12px; }
.theory-detail p { font-size: 14px; color: var(--gray-700); line-height: 1.8; }

/* ===== SERVICES ===== */
.service-list { display: flex; flex-direction: column; gap: 20px; }
.service-card { display: grid; grid-template-columns: 200px 1fr 1fr 1fr; gap: 24px; align-items: start; background: #fff; border: 1px solid var(--gray-200); border-radius: var(--radius); padding: 28px; transition: all .3s; }
.service-card:hover { box-shadow: var(--shadow); border-color: var(--gray-300); }
.service-form { font-size: 18px; font-weight: 700; color: var(--red); }
.service-purpose { font-size: 12px; color: var(--gray-500); }
.service-block h4 { font-size: 13px; font-weight: 600; color: var(--gray-900); margin-bottom: 6px; }
.service-block p { font-size: 13px; color: var(--gray-500); line-height: 1.6; }

/* ===== DATA SYSTEM ===== */
.data-dims { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-bottom: 48px; }
.data-dim-card { border-radius: var(--radius); padding: 28px; border: 1px solid var(--gray-200); background: var(--gray-50); transition: all .3s; }
.data-dim-card:hover { box-shadow: var(--shadow); }
.data-dim-card h4 { font-size: 16px; font-weight: 700; margin-bottom: 8px; }
.data-dim-card .dim-icon { font-size: 24px; }
.data-dim-card .dim-collect { font-size: 13px; color: var(--gray-500); margin-bottom: 12px; }
.data-dim-card .dim-source { font-size: 12px; color: var(--gray-300); padding-top: 12px; border-top: 1px dashed var(--gray-200); }
.data-reports { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-bottom: 48px; }
.data-report-card { border-radius: var(--radius); padding: 28px; text-align: center; }
.data-report-card.monthly { background: linear-gradient(135deg, #E8EDF5, #D1DAE8); }
.data-report-card.quarterly { background: linear-gradient(135deg, #E0F5F2, #C5EDE7); }
.data-report-card.annual { background: linear-gradient(135deg, #FFF4E6, #FFE8CC); }
.data-report-card h4 { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.data-report-card .rp-form { font-size: 12px; color: var(--gray-500); margin-bottom: 12px; }
.data-report-card p { font-size: 13px; color: var(--gray-700); line-height: 1.6; }
.data-questions { background: var(--navy); border-radius: var(--radius); padding: 40px; }
.data-questions h3 { color: #fff; font-size: 20px; text-align: center; margin-bottom: 28px; }
.q-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.q-card { text-align: center; }
.q-num { font-size: 32px; font-weight: 800; color: var(--gold); margin-bottom: 8px; }
.q-card p { color: rgba(255,255,255,0.7); font-size: 14px; }
.sub-title { font-size: 20px; font-weight: 700; color: var(--navy); margin-bottom: 20px; }

/* ===== PRICING ===== */
.pricing-age-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-bottom: 48px; }
.pricing-age-card { background: #fff; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--gray-200); transition: all .3s; }
.pricing-age-card.featured { border: 2px solid var(--red); box-shadow: var(--shadow-lg); }
.pricing-age-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.pricing-age-header { padding: 24px; text-align: center; }
.pricing-age-card .pa-age { font-size: 13px; color: var(--gray-500); margin-bottom: 4px; }
.pricing-age-card .pa-name { font-size: 20px; font-weight: 700; color: var(--gray-900); margin-bottom: 4px; }
.pricing-age-card .pa-mission { font-size: 13px; color: var(--red); font-weight: 600; }
.pricing-age-card.featured .pricing-age-header { background: var(--red); }
.pricing-age-card.featured .pa-name, .pricing-age-card.featured .pa-age, .pricing-age-card.featured .pa-mission { color: #fff; }
.pricing-age-body { padding: 24px; }
.pricing-age-body ul { list-style: none; margin-bottom: 24px; }
.pricing-age-body li { font-size: 13px; color: var(--gray-700); padding: 6px 0; border-bottom: 1px solid var(--gray-100); display: flex; align-items: start; gap: 8px; }
.pricing-age-body li::before { content: '✓'; color: var(--teal); font-weight: 700; flex-shrink: 0; }
.pricing-age-price { text-align: center; padding: 0 24px 24px; }
.pricing-age-price .pa-monthly { font-size: 13px; color: var(--gray-500); }
.pricing-age-price .pa-monthly strong { font-size: 24px; color: var(--gray-900); }
.pricing-age-price .pa-discount { font-size: 12px; color: var(--red); margin: 8px 0; }
.pricing-age-price .pa-annual { font-size: 13px; color: var(--gray-500); }
.pricing-age-price .pa-annual strong { font-size: 22px; color: var(--red); }
.pricing-age-price .pa-save { font-size: 12px; color: var(--teal); }
.pricing-table-wrap { background: #fff; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--gray-200); }
.pricing-table { width: 100%; border-collapse: collapse; }
.pricing-table th { background: var(--navy); color: #fff; font-size: 13px; padding: 14px 12px; font-weight: 600; text-align: center; white-space: nowrap; }
.pricing-table th.group { background: var(--navy-light); }
.pricing-table td { padding: 12px; font-size: 14px; text-align: center; border-bottom: 1px solid var(--gray-100); }
.pricing-table tr.highlight { background: var(--gold-light); }
.pricing-table tr.highlight td { font-weight: 700; }
.pricing-table .age { font-weight: 700; text-align: left; padding-left: 20px; }
.pricing-table .price { font-size: 18px; font-weight: 800; color: var(--red); }
.pricing-table .discount { color: var(--red); font-weight: 600; }
.pricing-table .save { color: var(--teal); font-weight: 600; }
.pricing-table tbody tr:hover { background: var(--gray-50); }
.pricing-table-note { font-size: 13px; color: var(--gray-500); text-align: center; margin-top: 16px; }

/* ===== DIFFERENTIATION ===== */
.diff-banner { text-align: center; background: linear-gradient(135deg, var(--red), var(--red-dark)); border-radius: var(--radius); padding: 32px; margin-bottom: 32px; color: #fff; }
.diff-banner h3 { font-size: 22px; font-weight: 700; }
.diff-table { width: 100%; border-collapse: collapse; background: #fff; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.diff-table th { padding: 16px 20px; font-size: 15px; font-weight: 700; text-align: left; }
.diff-table th.dim { background: var(--navy); color: #fff; width: 160px; }
.diff-table th.trad { background: var(--gray-200); color: var(--gray-700); text-align: center; }
.diff-table th.our { background: var(--red); color: #fff; text-align: center; }
.diff-table td { padding: 16px 20px; font-size: 14px; border-bottom: 1px solid var(--gray-100); vertical-align: top; line-height: 1.6; }
.diff-table td.dim-cell { font-weight: 700; color: var(--navy); background: var(--gray-50); }
.diff-table td.trad-cell { color: var(--gray-500); text-align: center; }
.diff-table td.our-cell { color: var(--gray-900); text-align: center; font-weight: 500; background: rgba(230,57,70,0.03); }

/* ===== SOLUTIONS ===== */
.sol-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.sol-card { background: #fff; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--gray-200); transition: all .3s; }
.sol-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-2px); }
.sol-header { padding: 16px 24px; display: flex; align-items: center; gap: 12px; }
.sol-card:nth-child(1) .sol-header { background: var(--red); }
.sol-card:nth-child(2) .sol-header { background: var(--gold); }
.sol-card:nth-child(3) .sol-header { background: var(--navy); }
.sol-card:nth-child(4) .sol-header { background: var(--teal); }
.sol-card:nth-child(5) .sol-header { background: var(--navy-light); }
.sol-card:nth-child(6) .sol-header { background: #6B5B95; }
.sol-card:nth-child(7) .sol-header { background: #D4654A; }
.sol-card:nth-child(8) .sol-header { background: #2D5A82; }
.sol-header h4 { color: #fff; font-size: 16px; font-weight: 700; }
.sol-body { padding: 20px 24px; }
.sol-body .sol-item { margin-bottom: 12px; }
.sol-body .sol-item:last-child { margin-bottom: 0; }
.sol-body .sol-label { font-size: 12px; font-weight: 600; color: var(--red); margin-bottom: 4px; }
.sol-body .sol-text { font-size: 13px; color: var(--gray-700); line-height: 1.6; }
.sol-goal { margin: 0 24px; padding: 12px 0; border-top: 1px dashed var(--gray-200); }
.sol-goal .sol-label { color: var(--teal); }
.sol-goal .sol-text { font-weight: 600; color: var(--gray-900); }

/* ===== DETAIL PAGE NAV (bottom) ===== */
.detail-nav { display: flex; justify-content: space-between; align-items: center; max-width: 1200px; margin: 0 auto; padding: 32px 24px; gap: 16px; flex-wrap: wrap; }
.detail-nav a { font-size: 14px; color: var(--gray-500); display: inline-flex; align-items: center; gap: 6px; padding: 10px 20px; border: 1px solid var(--gray-200); border-radius: 30px; transition: all .2s; }
.detail-nav a:hover { color: var(--red); border-color: var(--red-light); background: var(--red-light); }
.detail-nav .back-home { font-weight: 600; color: var(--navy); }

/* ===== FOOTER ===== */
.footer { background: var(--navy); padding: 48px 24px 32px; text-align: center; }
.footer-brand { font-size: 24px; font-weight: 800; color: #fff; margin-bottom: 8px; }
.footer-tagline { color: rgba(255,255,255,0.6); font-size: 14px; margin-bottom: 24px; }
.footer-links { display: flex; gap: 24px; justify-content: center; flex-wrap: wrap; margin-bottom: 20px; }
.footer-links a { color: rgba(255,255,255,0.5); font-size: 13px; }
.footer-copy { color: rgba(255,255,255,0.3); font-size: 12px; padding-top: 24px; border-top: 1px solid rgba(255,255,255,0.1); }

/* ===== ANIMATION ===== */
/* 默认可见：保证无 JS 环境（如平板 HTML 查看器）也能显示内容 */
.fade-in { opacity: 1; transform: none; transition: all .6s; }
/* 仅当 html.js 时才隐藏并触发淡入动画（渐进增强） */
html.js .fade-in { opacity: 0; transform: translateY(30px); }
html.js .fade-in.visible { opacity: 1; transform: translateY(0); }

/* ===== RESPONSIVE ===== */
@media (max-width: 980px) {
  .nav-links { display: none; }
  .nav-links.open { display: flex; flex-direction: column; position: absolute; top: 64px; left: 0; right: 0; background: #fff; padding: 16px 24px; box-shadow: 0 4px 20px rgba(0,0,0,0.08); gap: 8px; }
  .nav-links.open a { white-space: normal; }
  .nav-mobile-toggle { display: block; }
  .home-grid { grid-template-columns: repeat(2, 1fr); }
  .home-grid-3 { grid-template-columns: 1fr; }
  .pain-grid { grid-template-columns: repeat(2, 1fr); }
  .pain-grid.kids { grid-template-columns: repeat(3, 1fr); }
  .pain-grid.parents { grid-template-columns: repeat(2, 1fr); }
  .theory-grid { grid-template-columns: repeat(2, 1fr); }
  .theory-details { grid-template-columns: 1fr; }
  .service-card { grid-template-columns: 1fr; }
  .data-dims, .data-reports { grid-template-columns: 1fr; }
  .q-grid { grid-template-columns: 1fr; }
  .pricing-age-grid { grid-template-columns: 1fr; }
  .sol-grid { grid-template-columns: 1fr; }
  .diff-table { font-size: 12px; }
  .diff-table th, .diff-table td { padding: 10px 8px; }
  .stage-timeline { flex-direction: column; }
  .stage-card:not(:last-child)::after { content: '↓'; right: 50%; top: auto; bottom: -20px; transform: translateX(50%); }
}
@media (max-width: 580px) {
  .home-grid { grid-template-columns: 1fr; }
  .pain-grid { grid-template-columns: 1fr; }
  .pain-grid.kids { grid-template-columns: 1fr; }
  .pain-grid.parents { grid-template-columns: 1fr; }
  .theory-grid { grid-template-columns: 1fr; }
  .hero-numbers { gap: 12px; }
  .hero-num .divider { display: none; }
  .section { padding: 60px 16px; }
  .pricing-table { font-size: 12px; }
}