/* Zalo Wave - Sóng Kết Nối Theme */
:root {
  --blue: #0068FF;
  --blue-dark: #0050CC;
  --blue-light: #E8F2FF;
  --cyan: #00C4FF;
  --dark: #0D1B2A;
  --gray: #6B7280;
  --gray-light: #F3F7FF;
  --white: #FFFFFF;
  --border: #E5EDFF;
  --success: #10B981;
  --text: #1A2640;
  --shadow: 0 4px 24px rgba(0,104,255,0.10);
  --shadow-lg: 0 8px 40px rgba(0,104,255,0.16);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  color: var(--text);
  background: var(--white);
  line-height: 1.65;
}

/* ── NAV ── */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
}
.nav-inner {
  max-width: 1140px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.nav-logo {
  display: flex; align-items: center; gap: 10px;
  font-weight: 700; font-size: 1.25rem; color: var(--blue);
  text-decoration: none;
}
.nav-logo svg { width: 36px; height: 36px; }
.nav-links { display: flex; align-items: center; gap: 6px; }
.nav-links a {
  text-decoration: none; color: var(--gray);
  padding: 8px 18px; border-radius: 50px;
  font-size: 0.92rem; font-weight: 500;
  transition: all 0.2s;
}
.nav-links a:hover { color: var(--blue); background: var(--blue-light); }
.nav-links a.active { background: var(--blue); color: #fff; }
.nav-dl-btn {
  background: var(--blue); color: #fff;
  border: none; padding: 10px 22px; border-radius: 50px;
  font-size: 0.9rem; font-weight: 600; cursor: pointer;
  transition: background 0.2s, transform 0.1s;
}
.nav-dl-btn:hover { background: var(--blue-dark); transform: translateY(-1px); }
.nav-dl-btn:disabled { opacity: 0.7; cursor: not-allowed; }

/* ── HERO ── */
.hero {
  background: linear-gradient(135deg, #0068FF 0%, #0044BB 60%, #0D1B2A 100%);
  padding: 80px 24px;
  position: relative; overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute; top: -60px; right: -80px;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(0,196,255,0.18) 0%, transparent 65%);
  pointer-events: none;
}
.hero::after {
  content: '';
  position: absolute; bottom: -40px; left: -60px;
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(255,255,255,0.06) 0%, transparent 60%);
  pointer-events: none;
}
.hero-inner {
  max-width: 1140px; margin: 0 auto;
  display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center;
  position: relative; z-index: 1;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 6px;
  background: rgba(255,255,255,0.15); border: 1px solid rgba(255,255,255,0.25);
  color: #fff; padding: 6px 16px; border-radius: 50px;
  font-size: 0.82rem; font-weight: 600; margin-bottom: 20px;
  backdrop-filter: blur(8px);
}
.hero-title {
  font-size: 3rem; font-weight: 800; color: #fff;
  line-height: 1.15; margin-bottom: 20px;
}
.hero-title span { color: var(--cyan); }
.hero-sub {
  color: rgba(255,255,255,0.82); font-size: 1.05rem;
  line-height: 1.7; margin-bottom: 32px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.btn-primary {
  background: #fff; color: var(--blue);
  border: none; padding: 14px 28px; border-radius: 50px;
  font-size: 1rem; font-weight: 700; cursor: pointer;
  transition: all 0.2s; box-shadow: 0 4px 20px rgba(0,0,0,0.15);
  display: inline-flex; align-items: center; gap: 8px;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 32px rgba(0,0,0,0.2); }
.btn-primary:disabled { opacity: 0.7; cursor: not-allowed; }
.btn-secondary {
  background: rgba(255,255,255,0.12); color: #fff;
  border: 1px solid rgba(255,255,255,0.35); padding: 14px 28px; border-radius: 50px;
  font-size: 1rem; font-weight: 600; cursor: pointer;
  transition: all 0.2s; display: inline-flex; align-items: center; gap: 8px;
}
.btn-secondary:hover { background: rgba(255,255,255,0.22); }
.btn-secondary:disabled { opacity: 0.7; cursor: not-allowed; }
.hero-stats {
  display: flex; gap: 28px; margin-top: 36px;
}
.hero-stat { text-align: left; }
.hero-stat-num { font-size: 1.6rem; font-weight: 800; color: var(--cyan); }
.hero-stat-label { font-size: 0.78rem; color: rgba(255,255,255,0.7); }

/* Hero Phone Mockup */
.hero-visual { display: flex; justify-content: center; align-items: center; }
.phone-mockup {
  width: 280px; height: 520px;
  background: linear-gradient(160deg, #1a2a50 0%, #0d1b2a 100%);
  border-radius: 40px;
  border: 3px solid rgba(255,255,255,0.15);
  padding: 20px 16px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.4), inset 0 1px 0 rgba(255,255,255,0.1);
  position: relative;
  overflow: hidden;
}
.phone-mockup::before {
  content: '';
  position: absolute; top: 0; left: 50%; transform: translateX(-50%);
  width: 100px; height: 30px;
  background: #0d1b2a; border-radius: 0 0 20px 20px;
  z-index: 5;
}
.phone-screen {
  background: var(--white); border-radius: 26px;
  height: 100%; overflow: hidden;
}
.phone-header {
  background: var(--blue); padding: 40px 12px 12px;
  display: flex; align-items: center; gap: 8px;
}
.phone-header-title { color: #fff; font-size: 0.9rem; font-weight: 600; }
.phone-chat {
  padding: 10px 12px;
  display: flex; flex-direction: column; gap: 8px;
}
.chat-msg {
  max-width: 75%; padding: 8px 12px; border-radius: 14px; font-size: 0.72rem;
}
.chat-msg.in { background: #f0f2f5; align-self: flex-start; color: var(--text); }
.chat-msg.out { background: var(--blue); color: #fff; align-self: flex-end; }

/* ── SECTIONS ── */
.section { padding: 80px 24px; }
.section-alt { background: var(--gray-light); }
.section-dark { background: var(--dark); }
.container { max-width: 1140px; margin: 0 auto; }

.section-tag {
  display: inline-block;
  background: var(--blue-light); color: var(--blue);
  padding: 5px 14px; border-radius: 50px; font-size: 0.8rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 12px;
}
.section-title {
  font-size: 2.2rem; font-weight: 800; color: var(--dark);
  margin-bottom: 12px; line-height: 1.2;
}
.section-title.white { color: #fff; }
.section-sub {
  font-size: 1.05rem; color: var(--gray); margin-bottom: 48px; max-width: 580px;
}
.section-sub.white { color: rgba(255,255,255,0.7); }

/* ── FEATURE CARDS ── */
.feature-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.feature-card {
  background: #fff; border: 1px solid var(--border);
  border-radius: 20px; padding: 28px;
  transition: all 0.25s;
  box-shadow: 0 2px 8px rgba(0,104,255,0.04);
}
.feature-card:hover {
  transform: translateY(-4px); box-shadow: var(--shadow-lg);
  border-color: var(--blue);
}
.feature-icon {
  width: 52px; height: 52px;
  background: var(--blue-light); border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 16px;
}
.feature-icon svg { width: 26px; height: 26px; }
.feature-title { font-size: 1.05rem; font-weight: 700; color: var(--dark); margin-bottom: 8px; }
.feature-desc { font-size: 0.9rem; color: var(--gray); line-height: 1.6; }

/* ── STATS ── */
.stats-bar {
  background: linear-gradient(90deg, #0068FF 0%, #0044BB 100%);
  padding: 48px 24px;
}
.stats-grid {
  max-width: 1140px; margin: 0 auto;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
}
.stat-item { text-align: center; }
.stat-num { font-size: 2.4rem; font-weight: 900; color: #fff; line-height: 1; }
.stat-unit { font-size: 1.2rem; font-weight: 700; color: var(--cyan); }
.stat-label { font-size: 0.85rem; color: rgba(255,255,255,0.75); margin-top: 6px; }

/* ── PLATFORM DOWNLOAD ── */
.platform-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 20px;
}
.platform-card {
  background: #fff; border: 2px solid var(--border);
  border-radius: 20px; padding: 28px 24px; text-align: center;
  transition: all 0.25s;
}
.platform-card:hover { border-color: var(--blue); box-shadow: var(--shadow); }
.platform-card.featured {
  background: linear-gradient(135deg, #0068FF 0%, #0044BB 100%);
  border-color: transparent; grid-row: span 1;
}
.platform-card.featured .platform-name { color: #fff; }
.platform-card.featured .platform-desc { color: rgba(255,255,255,0.8); }
.platform-card.featured .platform-version { color: rgba(255,255,255,0.7); }
.platform-icon { width: 56px; height: 56px; margin: 0 auto 14px; }
.platform-icon svg { width: 56px; height: 56px; }
.platform-name { font-size: 1.1rem; font-weight: 700; color: var(--dark); margin-bottom: 6px; }
.platform-desc { font-size: 0.85rem; color: var(--gray); margin-bottom: 8px; }
.platform-version { font-size: 0.8rem; color: var(--gray); margin-bottom: 16px; }
.btn-dl {
  width: 100%; padding: 12px 18px; border-radius: 50px;
  font-size: 0.9rem; font-weight: 600; cursor: pointer;
  transition: all 0.2s; border: none;
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
}
.btn-dl-white {
  background: #fff; color: var(--blue);
}
.btn-dl-white:hover { background: #f0f4ff; }
.btn-dl-white:disabled { opacity: 0.7; cursor: not-allowed; }
.btn-dl-blue {
  background: var(--blue); color: #fff;
}
.btn-dl-blue:hover { background: var(--blue-dark); }
.btn-dl-blue:disabled { opacity: 0.7; cursor: not-allowed; }
.btn-dl-outline {
  background: transparent; color: var(--blue);
  border: 2px solid var(--blue) !important;
}
.btn-dl-outline:hover { background: var(--blue-light); }
.btn-dl-outline:disabled { opacity: 0.7; cursor: not-allowed; }

/* ── SHOWCASE (alternating) ── */
.showcase { padding: 80px 24px; }
.showcase-row {
  max-width: 1140px; margin: 0 auto 80px;
  display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center;
}
.showcase-row:last-child { margin-bottom: 0; }
.showcase-row.reverse .showcase-visual { order: -1; }
.showcase-tag {
  display: inline-block; background: var(--blue-light); color: var(--blue);
  padding: 4px 14px; border-radius: 50px; font-size: 0.78rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 12px;
}
.showcase-title { font-size: 1.7rem; font-weight: 800; color: var(--dark); margin-bottom: 12px; }
.showcase-desc { color: var(--gray); font-size: 0.97rem; line-height: 1.7; margin-bottom: 18px; }
.showcase-list { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.showcase-list li {
  display: flex; align-items: flex-start; gap: 10px;
  font-size: 0.92rem; color: var(--text);
}
.showcase-list li::before {
  content: '';
  width: 20px; height: 20px; min-width: 20px;
  background: var(--blue-light); border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  margin-top: 2px;
}
.check-item { display: flex; align-items: flex-start; gap: 10px; margin-bottom: 10px; }
.check-item svg { min-width: 20px; margin-top: 2px; }
.check-item span { font-size: 0.92rem; color: var(--text); line-height: 1.5; }

/* Showcase visual panels */
.panel {
  background: linear-gradient(145deg, #f0f6ff 0%, #e8f2ff 100%);
  border-radius: 24px; padding: 28px;
  border: 1px solid var(--border);
}
.panel-dark {
  background: linear-gradient(145deg, #0d1b2a 0%, #1a2a50 100%);
  border: 1px solid rgba(0,104,255,0.3);
}
.panel-title { font-size: 0.75rem; font-weight: 600; color: var(--gray); margin-bottom: 16px; text-transform: uppercase; letter-spacing: 0.06em; }
.panel-title.white { color: rgba(255,255,255,0.5); }

/* Group panel */
.group-item { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.group-avatar {
  width: 36px; height: 36px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.75rem; font-weight: 700; color: #fff;
  flex-shrink: 0;
}
.group-info { flex: 1; }
.group-name { font-size: 0.82rem; font-weight: 600; color: var(--dark); }
.group-count { font-size: 0.73rem; color: var(--gray); }
.group-badge {
  background: var(--blue); color: #fff;
  font-size: 0.7rem; font-weight: 700; border-radius: 50px;
  padding: 2px 8px;
}

/* Cloud panel */
.cloud-stat { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.cloud-icon { width: 40px; height: 40px; background: var(--blue-light); border-radius: 10px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.cloud-label { font-size: 0.82rem; color: rgba(255,255,255,0.7); }
.cloud-val { font-size: 1rem; font-weight: 700; color: #fff; }
.progress-bar { height: 6px; background: rgba(255,255,255,0.15); border-radius: 3px; margin-top: 4px; }
.progress-fill { height: 100%; background: var(--cyan); border-radius: 3px; }

/* Sticker panel */
.sticker-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; }
.sticker-item { aspect-ratio: 1; border-radius: 12px; display: flex; align-items: center; justify-content: center; font-size: 1.6rem; }

/* ── REVIEWS ── */
.reviews-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px;
}
.review-card {
  background: #fff; border: 1px solid var(--border);
  border-radius: 20px; padding: 24px;
  transition: box-shadow 0.2s;
}
.review-card:hover { box-shadow: var(--shadow); }
.review-header { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.review-avatar {
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--blue); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem; font-weight: 700; flex-shrink: 0;
}
.review-name { font-size: 0.9rem; font-weight: 700; color: var(--dark); }
.review-stars { color: #F59E0B; font-size: 0.85rem; }
.review-text { font-size: 0.88rem; color: var(--gray); line-height: 1.6; font-style: italic; }
.review-text::before { content: '"'; font-size: 1.5rem; color: var(--blue); line-height: 0; vertical-align: -0.5em; }

/* ── COMPARISON TABLE ── */
.compare-table { width: 100%; border-collapse: collapse; border-radius: 16px; overflow: hidden; }
.compare-table th, .compare-table td {
  padding: 14px 18px; text-align: center; font-size: 0.9rem;
}
.compare-table thead { background: var(--blue); color: #fff; }
.compare-table th { font-weight: 700; }
.compare-table th:first-child, .compare-table td:first-child { text-align: left; }
.compare-table tbody tr:nth-child(even) { background: var(--blue-light); }
.compare-table tbody tr:nth-child(odd) { background: #fff; }
.compare-table td { color: var(--text); }
.compare-table .zalo-col { font-weight: 700; color: var(--blue); }
.check-yes { color: var(--success); font-size: 1.1rem; }
.check-no { color: #EF4444; }
.check-partial { color: #F59E0B; }

/* ── FAQ ── */
.faq-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.faq-item {
  background: #fff; border: 1px solid var(--border);
  border-radius: 16px; overflow: hidden;
  transition: box-shadow 0.2s;
}
.faq-item:hover { box-shadow: var(--shadow); }
.faq-q {
  padding: 18px 22px; font-size: 0.95rem; font-weight: 700; color: var(--dark);
  cursor: pointer; display: flex; align-items: center; justify-content: space-between;
  gap: 12px; user-select: none;
}
.faq-q:hover { color: var(--blue); }
.faq-icon { min-width: 20px; transition: transform 0.3s; }
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-a {
  padding: 0 22px; max-height: 0; overflow: hidden;
  transition: all 0.3s ease; font-size: 0.88rem; color: var(--gray); line-height: 1.7;
}
.faq-item.open .faq-a { padding: 0 22px 18px; max-height: 300px; }

/* ── INSTALL STEPS ── */
.steps-list { counter-reset: step; }
.step-item {
  display: flex; gap: 20px; margin-bottom: 28px; position: relative;
}
.step-item:not(:last-child)::after {
  content: ''; position: absolute; left: 19px; top: 48px;
  width: 2px; height: calc(100% - 20px);
  background: var(--border);
}
.step-num {
  width: 40px; height: 40px; min-width: 40px; border-radius: 50%;
  background: var(--blue); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.9rem; font-weight: 700; position: relative; z-index: 1;
}
.step-content { flex: 1; padding-top: 8px; }
.step-title { font-size: 1rem; font-weight: 700; color: var(--dark); margin-bottom: 6px; }
.step-desc { font-size: 0.88rem; color: var(--gray); line-height: 1.6; }

/* ── VERSION LOG ── */
.version-log { display: flex; flex-direction: column; gap: 16px; }
.version-item {
  display: flex; gap: 20px; align-items: flex-start;
  background: #fff; border: 1px solid var(--border); border-radius: 16px; padding: 20px 24px;
}
.version-badge {
  background: var(--blue); color: #fff;
  font-size: 0.8rem; font-weight: 700; padding: 4px 12px; border-radius: 50px;
  white-space: nowrap;
}
.version-info { flex: 1; }
.version-name { font-size: 0.95rem; font-weight: 700; color: var(--dark); margin-bottom: 4px; }
.version-date { font-size: 0.8rem; color: var(--gray); margin-bottom: 8px; }
.version-changes { font-size: 0.85rem; color: var(--text); line-height: 1.6; }

/* ── DOWNLOAD PAGE ── */
.dl-hero {
  background: linear-gradient(135deg, #0068FF 0%, #003DB3 100%);
  padding: 60px 24px; text-align: center;
}
.dl-hero-title { font-size: 2.4rem; font-weight: 800; color: #fff; margin-bottom: 10px; }
.dl-hero-sub { color: rgba(255,255,255,0.8); font-size: 1rem; }

.win-main-card {
  background: linear-gradient(135deg, #0068FF 0%, #003DB3 100%);
  border-radius: 24px; padding: 40px; color: #fff; margin-bottom: 32px;
  display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center;
}
.win-info-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-bottom: 24px;
}
.win-info-item {
  background: rgba(255,255,255,0.12); border-radius: 12px; padding: 12px 16px;
}
.win-info-label { font-size: 0.75rem; color: rgba(255,255,255,0.65); margin-bottom: 4px; }
.win-info-val { font-size: 0.95rem; font-weight: 700; color: #fff; }

.other-platforms {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px;
}
.other-card {
  background: #fff; border: 2px solid var(--border); border-radius: 20px;
  padding: 28px 22px; text-align: center; transition: all 0.2s;
}
.other-card:hover { border-color: var(--blue); box-shadow: var(--shadow); }
.other-icon { width: 52px; height: 52px; margin: 0 auto 14px; }
.other-name { font-size: 1.1rem; font-weight: 700; color: var(--dark); margin-bottom: 6px; }
.other-req { font-size: 0.82rem; color: var(--gray); margin-bottom: 14px; }

/* Install Steps Side by Side */
.install-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; }
.install-col-title { font-size: 1.2rem; font-weight: 700; color: var(--dark); margin-bottom: 24px; display: flex; align-items: center; gap: 8px; }

/* Sys Req Table */
.sysreq-tabs { display: flex; gap: 8px; margin-bottom: 28px; }
.tab-btn {
  padding: 8px 22px; border-radius: 50px;
  border: 2px solid var(--border); background: #fff; color: var(--gray);
  font-size: 0.88rem; font-weight: 600; cursor: pointer; transition: all 0.2s;
}
.tab-btn.active { background: var(--blue); border-color: var(--blue); color: #fff; }
.tab-content { display: none; }
.tab-content.active { display: block; }
.sysreq-table { width: 100%; border-collapse: collapse; }
.sysreq-table th, .sysreq-table td {
  padding: 12px 16px; text-align: left; border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
}
.sysreq-table th { background: var(--blue-light); color: var(--blue); font-weight: 700; }
.sysreq-table td { color: var(--text); }

/* Safe Download Banner */
.safe-banner {
  background: linear-gradient(90deg, #E8F5FF 0%, #F0F7FF 100%);
  border: 1px solid #B3D4FF; border-radius: 16px; padding: 24px 28px;
  display: flex; align-items: center; gap: 20px;
}
.safe-icon { min-width: 48px; height: 48px; background: var(--blue-light); border-radius: 12px; display: flex; align-items: center; justify-content: center; }
.safe-title { font-size: 1rem; font-weight: 700; color: var(--dark); margin-bottom: 4px; }
.safe-desc { font-size: 0.88rem; color: var(--gray); line-height: 1.6; }

/* ── FOOTER ── */
.footer {
  background: var(--dark); padding: 48px 24px 24px;
}
.footer-inner {
  max-width: 1140px; margin: 0 auto;
}
.footer-top {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px;
  padding-bottom: 36px; border-bottom: 1px solid rgba(255,255,255,0.1);
  margin-bottom: 24px;
}
.footer-logo { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
.footer-logo-text { font-size: 1.2rem; font-weight: 700; color: #fff; }
.footer-tagline { font-size: 0.88rem; color: rgba(255,255,255,0.55); line-height: 1.65; }
.footer-col-title { font-size: 0.85rem; font-weight: 700; color: rgba(255,255,255,0.6); text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 14px; }
.footer-links { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.footer-links a { color: rgba(255,255,255,0.55); text-decoration: none; font-size: 0.88rem; transition: color 0.2s; }
.footer-links a:hover { color: var(--cyan); }
.footer-bottom { text-align: center; }
.footer-safe {
  background: rgba(0,104,255,0.12); border: 1px solid rgba(0,104,255,0.25);
  border-radius: 10px; padding: 14px 20px; margin-bottom: 16px;
  font-size: 0.85rem; color: rgba(255,255,255,0.8); line-height: 1.6;
}
.footer-copy { font-size: 0.8rem; color: rgba(255,255,255,0.4); }

/* ── vi.html ── */
.article-hero {
  background: linear-gradient(135deg, #0068FF 0%, #003DB3 100%);
  padding: 60px 24px;
}
.breadcrumb { display: flex; align-items: center; gap: 8px; margin-bottom: 16px; }
.breadcrumb a, .breadcrumb span { font-size: 0.82rem; color: rgba(255,255,255,0.7); text-decoration: none; }
.breadcrumb a:hover { color: #fff; }
.breadcrumb-sep { color: rgba(255,255,255,0.4); }
.article-hero-title { font-size: 2.2rem; font-weight: 800; color: #fff; margin-bottom: 12px; line-height: 1.2; }
.article-hero-meta { display: flex; align-items: center; gap: 16px; }
.meta-tag {
  background: rgba(255,255,255,0.15); color: rgba(255,255,255,0.9);
  padding: 4px 12px; border-radius: 50px; font-size: 0.78rem; font-weight: 600;
}

.article-layout {
  max-width: 1140px; margin: 0 auto;
  display: grid; grid-template-columns: 1fr 300px; gap: 48px;
  padding: 48px 24px;
}
.article-body h2 { font-size: 1.5rem; font-weight: 800; color: var(--dark); margin: 36px 0 14px; padding-top: 8px; }
.article-body h3 { font-size: 1.15rem; font-weight: 700; color: var(--dark); margin: 24px 0 10px; }
.article-body p { font-size: 0.96rem; color: var(--text); line-height: 1.8; margin-bottom: 16px; }
.article-body ul, .article-body ol { padding-left: 24px; margin-bottom: 16px; }
.article-body li { font-size: 0.93rem; color: var(--text); line-height: 1.7; margin-bottom: 6px; }
.article-body strong { color: var(--dark); }
.article-body a { color: var(--blue); }

.toc-sidebar { position: sticky; top: 84px; align-self: start; }
.toc-card {
  background: var(--gray-light); border: 1px solid var(--border);
  border-radius: 16px; padding: 20px;
}
.toc-title { font-size: 0.85rem; font-weight: 700; color: var(--dark); text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 14px; }
.toc-list { list-style: none; display: flex; flex-direction: column; gap: 6px; }
.toc-list a { font-size: 0.85rem; color: var(--gray); text-decoration: none; padding: 4px 8px; border-radius: 6px; display: block; transition: all 0.2s; }
.toc-list a:hover, .toc-list a.active { color: var(--blue); background: var(--blue-light); }
.toc-dl-card {
  background: linear-gradient(135deg, #0068FF 0%, #003DB3 100%);
  border-radius: 16px; padding: 20px; margin-top: 16px; text-align: center;
}
.toc-dl-title { font-size: 1rem; font-weight: 700; color: #fff; margin-bottom: 6px; }
.toc-dl-sub { font-size: 0.82rem; color: rgba(255,255,255,0.75); margin-bottom: 14px; }
.toc-dl-btn {
  display: block; background: #fff; color: var(--blue);
  text-decoration: none; padding: 10px 18px; border-radius: 50px;
  font-size: 0.88rem; font-weight: 700; transition: all 0.2s;
}
.toc-dl-btn:hover { background: #f0f4ff; transform: translateY(-1px); }

/* Tip cards */
.tip-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; margin: 24px 0; }
.tip-card { background: var(--blue-light); border-radius: 14px; padding: 16px; }
.tip-num { font-size: 0.75rem; font-weight: 700; color: var(--blue); text-transform: uppercase; margin-bottom: 6px; }
.tip-title { font-size: 0.9rem; font-weight: 700; color: var(--dark); margin-bottom: 6px; }
.tip-desc { font-size: 0.82rem; color: var(--gray); line-height: 1.5; }

/* CTA Box */
.cta-box {
  background: linear-gradient(135deg, #0068FF 0%, #0044BB 100%);
  border-radius: 24px; padding: 48px; text-align: center; margin: 48px 0;
}
.cta-box-title { font-size: 1.8rem; font-weight: 800; color: #fff; margin-bottom: 10px; }
.cta-box-sub { color: rgba(255,255,255,0.8); font-size: 1rem; margin-bottom: 28px; }
.cta-box-btn {
  display: inline-block; background: #fff; color: var(--blue);
  text-decoration: none; padding: 16px 40px; border-radius: 50px;
  font-size: 1.05rem; font-weight: 700; transition: all 0.2s;
  box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}
.cta-box-btn:hover { transform: translateY(-2px); box-shadow: 0 8px 32px rgba(0,0,0,0.2); }

/* ── RESPONSIVE ── */
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { display: none; }
  .feature-grid { grid-template-columns: 1fr 1fr; }
  .platform-grid { grid-template-columns: 1fr 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .showcase-row { grid-template-columns: 1fr; }
  .showcase-row.reverse .showcase-visual { order: 0; }
  .reviews-grid { grid-template-columns: 1fr 1fr; }
  .faq-grid { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 28px; }
  .win-main-card { grid-template-columns: 1fr; }
  .other-platforms { grid-template-columns: 1fr; }
  .install-cols { grid-template-columns: 1fr; }
  .article-layout { grid-template-columns: 1fr; }
  .toc-sidebar { display: none; }
  .tip-grid { grid-template-columns: 1fr; }
  .compare-table { font-size: 0.78rem; }
  .compare-table th, .compare-table td { padding: 10px 10px; }
}
@media (max-width: 600px) {
  .hero-title { font-size: 2rem; }
  .section-title { font-size: 1.7rem; }
  .feature-grid { grid-template-columns: 1fr; }
  .platform-grid { grid-template-columns: 1fr; }
  .reviews-grid { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; }
  .nav-links { gap: 0; }
  .nav-links a { padding: 6px 10px; font-size: 0.82rem; }
  .hero-stats { flex-wrap: wrap; gap: 16px; }
}

@keyframes spin { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
.fade-in { animation: fadeInUp 0.6s ease both; }