/* ================================================
   OC-Persona — 官网 CSS
   深海军蓝风 (Deep Navy Glass)
   ================================================ */

/* ======== Variables ======== */
:root {
  /* Background — 深海军蓝三层 */
  --bg-void:   #0a0e1a;   /* 最底层，近乎黑 */
  --bg-deep:   #16213e;   /* 中层深蓝 */
  --bg-surface:#1a2a4a;   /* 表面蓝 */

  /* Glass materials — 深色版 */
  --glass-bg:         rgba(22, 33, 62, 0.65);
  --glass-bg-hover:   rgba(26, 42, 74, 0.85);
  --glass-border:     rgba(233, 69, 96, 0.25);
  --glass-shine:      rgba(233, 69, 96, 0.12);
  --glass-shine-strong:rgba(233, 69, 96, 0.20);

  /* Accent palette — OC 品牌红 + 深蓝 */
  --accent:      #e94560;     /* OC 品牌红 */
  --accent-2:    #0f3460;     /* 深蓝辅助 */
  --accent-glow: rgba(233, 69, 96, 0.45);
  --accent-blue-glow: rgba(15, 52, 96, 0.60);

  /* Text */
  --text-bright: #e0e8f0;
  --text-normal: #a0b4c8;
  --text-dim:    #5c7090;

  /* Sizing */
  --nav-height: 64px;
  --max-width: 1100px;
  --radius: 16px;
  --radius-sm: 10px;
  --radius-pill: 999px;

  /* Timing */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

/* ======== Native Scrollbar (subtle) ======== */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: rgba(233, 69, 96, 0.25);
  border-radius: 999px;
  background-clip: padding-box;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(233, 69, 96, 0.50);
  background-clip: padding-box;
}
* { scrollbar-width: thin; scrollbar-color: rgba(233,69,96,0.20) transparent; }

/* ======== Scroll ======== */
html {
  scroll-padding-top: var(--nav-height);
  scroll-behavior: auto;
}
#hero, #features, #workflow, #demo, #faq, #footer { /* no snap */ }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background: linear-gradient(160deg, #0a0e1a 0%, #16213e 40%, #1a2a4a 100%);
  color: var(--text-normal);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: inherit; text-decoration: none; }
button { cursor: pointer; font-family: inherit; border: none; outline: none; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

/* ======== Background Orbs — 深蓝红光晕 ======== */
.bg-orb {
  position: fixed;
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
  will-change: transform, opacity;
}

/* 左上 — 品牌红光晕 */
.bg-orb-1 {
  width: 500px; height: 500px;
  top: -150px; left: -80px;
  background: radial-gradient(circle, rgba(233,69,96,0.45) 0%, rgba(15,52,96,0.30) 50%, transparent 75%);
  filter: blur(70px);
  opacity: 1;
  animation: orbDrift1 12s ease-in-out infinite alternate;
}
/* 右上 — 深蓝光晕 */
.bg-orb-2 {
  width: 600px; height: 600px;
  top: -200px; right: -120px;
  background: radial-gradient(circle, rgba(15,52,96,0.55) 0%, rgba(22,33,62,0.40) 50%, transparent 75%);
  filter: blur(80px);
  opacity: 0.7;
  animation: orbDrift2 15s ease-in-out infinite alternate;
}
/* 中下偏左 — 品牌红光晕 */
.bg-orb-3 {
  width: 400px; height: 400px;
  bottom: 10%; left: -100px;
  background: radial-gradient(circle, rgba(233,69,96,0.30) 0%, rgba(15,52,96,0.25) 50%, transparent 75%);
  filter: blur(65px);
  opacity: 0.6;
  animation: orbDrift3 10s ease-in-out infinite alternate;
}
/* 中下偏右 — 深蓝 */
.bg-orb-4 {
  width: 500px; height: 500px;
  bottom: -150px; right: -80px;
  background: radial-gradient(circle, rgba(22,33,62,0.50) 0%, rgba(15,52,96,0.35) 50%, transparent 75%);
  filter: blur(70px);
  opacity: 0.8;
  animation: orbDrift4 18s ease-in-out infinite alternate;
}
/* 中上偏右 — 微弱蓝 */
.bg-orb-5 {
  width: 300px; height: 300px;
  top: 30%; right: 10%;
  background: radial-gradient(circle, rgba(15,52,96,0.35) 0%, transparent 70%);
  filter: blur(50px);
  opacity: 0.4;
  animation: orbDrift5 20s ease-in-out infinite alternate;
}
/* 左下 — 微弱红 */
.bg-orb-6 {
  width: 350px; height: 350px;
  bottom: 20%; left: 15%;
  background: radial-gradient(circle, rgba(233,69,96,0.20) 0%, transparent 70%);
  filter: blur(60px);
  opacity: 0.35;
  animation: orbDrift6 14s ease-in-out infinite alternate;
}

@keyframes orbDrift1 { from{transform:translate(0,0)} to{transform:translate(30px,20px)} }
@keyframes orbDrift2 { from{transform:translate(0,0)} to{transform:translate(-20px,30px)} }
@keyframes orbDrift3 { from{transform:translate(0,0)} to{transform:translate(25px,-15px)} }
@keyframes orbDrift4 { from{transform:translate(0,0)} to{transform:translate(-30px,-20px)} }
@keyframes orbDrift5 { from{transform:translate(0,0)} to{transform:translate(15px,25px)} }
@keyframes orbDrift6 { from{transform:translate(0,0)} to{transform:translate(-20px,-20px)} }

/* ======== Navigation ======== */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--nav-height);
  background: rgba(10, 14, 26, 0.80);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(233,69,96,0.12);
  transition: box-shadow 0.3s;
}
#navbar.scrolled {
  box-shadow: 0 2px 24px rgba(0,0,0,0.40), 0 0 0 1px rgba(233,69,96,0.10);
}
.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}
.nav-logo-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  object-fit: contain;
  display: block;
}

.logo-sub {
  font-size: 0.72rem;
  color: var(--text-dim);
  opacity: 0.7;
}
.nav-links {
  display: flex;
  gap: 28px;
}
.nav-links a {
  font-size: 0.875rem;
  color: var(--text-normal);
  transition: color 0.2s;
  position: relative;
}
.nav-links a:hover { color: var(--accent); }
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0; right: 0;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
  transform: scaleX(0);
  transition: transform 0.25s var(--ease-out);
}
.nav-links a:hover::after { transform: scaleX(1); }

.btn-download-nav {
  font-size: 0.825rem;
  font-weight: 600;
  color: var(--bg-void);
  background: var(--accent);
  padding: 8px 20px;
  border-radius: var(--radius-pill);
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
}
.btn-download-nav:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 18px var(--accent-glow);
  background: #f05070;
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  background: none;
  border-bottom-left-radius: 14px;
  border-bottom-right-radius: 14px;
  transition: border-radius 0.35s cubic-bezier(0.4, 0, 0.2, 1),
              background 0.35s ease;
}
.hamburger:hover {
  border-bottom-left-radius: 18px;
  border-bottom-right-radius: 18px;
  background: rgba(233, 69, 96, 0.06);
}
.hamburger.open {
  border-bottom-left-radius: 22px;
  border-bottom-right-radius: 22px;
  background: rgba(233, 69, 96, 0.10);
}
.hamburger span {
  display: block;
  width: 22px; height: 2px;
  background: var(--text-bright);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ======== Hero ======== */
#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--nav-height);
  position: relative;
  z-index: 1;
}
.hero-content {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 60px 24px 80px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 48px;
  align-items: center;
}
.hero-badge {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent);
  background: rgba(233,69,96,0.10);
  border: 1px solid rgba(233,69,96,0.25);
  border-radius: var(--radius-pill);
  padding: 6px 16px;
  margin-bottom: 20px;
  letter-spacing: 0.03em;
}
.hero-title {
  font-size: 2.8rem;
  font-weight: 800;
  line-height: 1.15;
  color: var(--text-bright);
  margin-bottom: 16px;
  letter-spacing: -0.03em;
}
.hero-title .highlight {
  background: linear-gradient(135deg, var(--accent), #ff6b8a);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-normal);
  margin-bottom: 14px;
  font-weight: 500;
}
.hero-desc {
  font-size: 0.92rem;
  color: var(--text-dim);
  line-height: 1.8;
  margin-bottom: 32px;
}
.hero-buttons {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--bg-void);
  background: var(--accent);
  padding: 12px 28px;
  border-radius: var(--radius-pill);
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
  cursor: pointer;
  border: none;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px var(--accent-glow);
  background: #f05070;
}
.btn-outline {
  display: inline-flex;
  align-items: center;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-bright);
  background: transparent;
  border: 1.5px solid rgba(160,180,200,0.35);
  padding: 12px 28px;
  border-radius: var(--radius-pill);
  transition: border-color 0.2s, background 0.2s;
}
.btn-outline:hover {
  border-color: var(--accent);
  background: rgba(233,69,96,0.08);
}

/* ======== Phone Mock ======== */
.hero-phone {
  flex-shrink: 0;
  display: none;
}
@media(min-width: 900px) {
  .hero-phone { display: block; }
}
.hp-body {
  width: 240px;
  background: linear-gradient(160deg, #16213e, #1a2a4a);
  border-radius: 32px;
  padding: 10px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.50), 0 0 0 1px rgba(233,69,96,0.15), inset 0 1px 0 rgba(255,255,255,0.05);
}
.hp-notch {
  width: 80px; height: 22px;
  background: var(--bg-void);
  border-radius: 0 0 14px 14px;
  margin: 0 auto 8px;
}
.hp-screen {
  height: 380px;
  background: var(--bg-void);
  border-radius: 22px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.hp-header { padding: 10px 14px 8px; display: flex; align-items: center; gap: 8px; }
.hp-avatar-sm { width: 28px; height: 28px; border-radius: 50%; background: var(--accent); opacity: 0.6; }
.hp-name-sm { width: 60px; height: 8px; border-radius: 4px; background: rgba(160,180,200,0.2); }
.hp-msgs { flex: 1; padding: 8px 10px; display: flex; flex-direction: column; gap: 8px; }
.hp-msg { padding: 8px 12px; border-radius: 12px; max-width: 80%; }
.hp-msg-ai { background: rgba(233,69,96,0.12); align-self: flex-start; }
.hp-msg-usr { background: rgba(15,52,96,0.5); align-self: flex-end; }
.hp-bar { border-radius: 4px; background: rgba(160,180,200,0.15); margin-bottom: 5px; }
.hp-bar-lg { width: 100%; height: 8px; }
.hp-bar-md { width: 70%; height: 6px; }
.hp-bar-sm { width: 55%; height: 6px; }
.hp-bar-xs { width: 35%; height: 5px; }
.hp-input-sm { padding: 8px 10px; display: flex; gap: 6px; align-items: center; border-top: 1px solid rgba(160,180,200,0.08); }
.hp-input-bar-sm { flex: 1; height: 22px; border-radius: 6px; background: rgba(160,180,200,0.06); border: 1px solid rgba(160,180,200,0.10); }
.hp-send-sm { width: 22px; height: 22px; border-radius: 50%; background: var(--accent); opacity: 0.7; }

/* ======== Sections ======== */
.section {
  position: relative;
  z-index: 1;
  padding: 80px 24px;
}

/* ======== Section Gradient Seams ======== */
/* Bottom fade-out: from section → body gradient */
.section::after {
  content: '';
  position: absolute;
  left: 0; right: 0;
  bottom: -80px;
  height: 80px;
  background: linear-gradient(to bottom, rgba(10,14,26,0.45), transparent);
  pointer-events: none;
  z-index: 0;
}
/* Top fade-in: body gradient → section-alt dark overlay */
.section-alt::before {
  content: '';
  position: absolute;
  left: 0; right: 0;
  top: -80px;
  height: 80px;
  background: linear-gradient(to bottom, transparent, rgba(10, 14, 26, 0.45));
  pointer-events: none;
  z-index: 0;
}
/* Bottom fade-out: section-alt → body gradient */
.section-alt::after {
  content: '';
  position: absolute;
  left: 0; right: 0;
  bottom: -80px;
  height: 80px;
  background: linear-gradient(to bottom, rgba(10, 14, 26, 0.45), transparent);
  pointer-events: none;
  z-index: 0;
}
.section-alt {
  position: relative;
  background: rgba(10, 14, 26, 0.45);
  border-top: 1px solid rgba(233,69,96,0.06);
  border-bottom: 1px solid rgba(233,69,96,0.06);
}
.section-header {
  text-align: center;
  max-width: 560px;
  margin: 0 auto 52px;
}
.section-header h2 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-bright);
  margin-bottom: 10px;
  letter-spacing: -0.02em;
}
.section-header p {
  font-size: 0.92rem;
  color: var(--text-dim);
}

/* ======== Feature Cards ======== */
.features-grid {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
@media(min-width: 700px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
}

.feature-card {
  padding: 28px 24px;
  transition: transform 0.3s var(--ease-out), box-shadow 0.3s, border-color 0.3s;
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.30), 0 0 0 1px rgba(233,69,96,0.20);
  border-color: rgba(233,69,96,0.30);
}
.feature-icon { font-size: 2rem; margin-bottom: 14px; }
.feature-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-bright);
  margin-bottom: 8px;
}
.feature-card p {
  font-size: 0.875rem;
  color: var(--text-dim);
  line-height: 1.7;
}

/* ======== Products Grid ======== */
.products-grid {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.product-card {
  padding: 28px 24px;
  transition: transform 0.3s var(--ease-out), box-shadow 0.3s, border-color 0.3s;
  position: relative;
  overflow: hidden;
}
.product-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  opacity: 0;
  transition: opacity 0.3s;
}
.product-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.30), 0 0 0 1px rgba(233,69,96,0.20);
  border-color: rgba(233,69,96,0.30);
}
.product-card:hover::before { opacity: 1; }
.product-badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--accent);
  background: rgba(233,69,96,0.10);
  border: 1px solid rgba(233,69,96,0.25);
  border-radius: var(--radius-pill);
  padding: 3px 10px;
  margin-bottom: 14px;
  letter-spacing: 0.03em;
}
.product-icon { font-size: 2rem; margin-bottom: 12px; }
.product-img-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  object-fit: cover;
  margin-bottom: 12px;
  display: block;
}
.product-card h3 { font-size: 1.12rem; font-weight: 600; margin-bottom: 8px; color: var(--text-bright); }
.product-card p { color: var(--text-dim); font-size: 0.88rem; line-height: 1.7; margin-bottom: 18px; }
.product-link {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
  transition: color 0.2s, opacity 0.2s;
}
.product-link:hover { color: #f05070; }
.product-link[href="#"] { opacity: 0.5; pointer-events: none; }

/* ======== Glass Card ======== */
.glass-card {
  background: var(--glass-bg);
  border: 1px solid rgba(233,69,96,0.15);
  border-radius: var(--radius);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

/* ======== Workflow ======== */
.workflow-steps {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
}
.wf-step {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  text-align: left;
  padding: 20px;
  width: 100%;
}
.wf-number {
  flex-shrink: 0;
  width: 48px; height: 48px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--bg-void);
  background: var(--accent);
  border-radius: 14px;
}
.wf-content h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-bright);
  margin-bottom: 6px;
}
.wf-content p {
  font-size: 0.875rem;
  color: var(--text-dim);
  line-height: 1.7;
}
.wf-connector {
  width: 2px;
  height: 24px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  opacity: 0.40;
  flex-shrink: 0;
}

/* ======== Demo / Phone Wireframe ======== */
.demo-container {
  max-width: 680px;
  margin: 0 auto;
}
.phone-wireframe {
  background: linear-gradient(160deg, #16213e, #0f3460);
  border-radius: 32px;
  padding: 12px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.50), 0 0 0 1px rgba(233,69,96,0.12), inset 0 1px 0 rgba(255,255,255,0.04);
}
.pw-topbar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px 6px;
}
.pw-avatar {
  width: 32px; height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), #ff6b8a);
  display: flex; align-items: center; justify-content: center;
  position: relative;
}
.pw-avatar-ring {
  position: absolute; inset: -4px;
  border-radius: 50%;
  border: 2px solid rgba(233,69,96,0.40);
}
.pw-avatar-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: #4ade80;
}
.pw-namebar { flex: 1; }
.pw-name-line { width: 80px; height: 8px; border-radius: 4px; background: var(--text-bright); opacity: 0.6; margin-bottom: 5px; }
.pw-status-line { width: 50px; height: 5px; border-radius: 3px; background: rgba(74,222,128,0.5); }

.pw-bubbles { padding: 12px; display: flex; flex-direction: column; gap: 10px; min-height: 260px; }
.pw-bubble {
  max-width: 82%;
  padding: 10px 14px;
  border-radius: 14px;
  position: relative;
}
.pw-bubble.pw-ai {
  background: rgba(233,69,96,0.12);
  border: 1px solid rgba(233,69,96,0.18);
  align-self: flex-start;
  border-bottom-left-radius: 4px;
}
.pw-bubble.pw-user {
  background: rgba(15,52,96,0.6);
  align-self: flex-end;
  border-bottom-right-radius: 4px;
}
.pw-bubble-tail {
  position: absolute;
  bottom: 0; left: -6px;
  width: 12px; height: 12px;
  background: rgba(233,69,96,0.12);
  border-left: 1px solid rgba(233,69,96,0.18);
  border-bottom: 1px solid rgba(233,69,96,0.18);
  border-bottom-left-radius: 6px;
}
.pw-text { border-radius: 4px; background: rgba(160,180,200,0.12); margin-bottom: 6px; }
.pw-text:last-child { margin-bottom: 0; }
.pw-text-long { width: 100%; height: 18px; }
.pw-text-med { width: 75%; height: 14px; }
.pw-text-short { width: 40%; height: 12px; }

.pw-input-bar {
  height: 40px;
  margin: 4px 12px 12px;
  border-radius: 20px;
  background: rgba(160,180,200,0.06);
  border: 1px solid rgba(160,180,200,0.12);
}

/* ======== Demo Image (screenshot) ======== */
.demo-image-wrapper {
  max-width: 640px;
  margin: 0 auto;
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 16px 48px rgba(0,0,0,0.45), 0 0 0 1px rgba(233,69,96,0.10);
}
.demo-img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 20px;
}

/* ======== Download Card ======== */
.download-card {
  max-width: 420px;
  margin: 0 auto;
  padding: 36px 32px;
  text-align: center;
}
.dl-icon { font-size: 2.5rem; margin-bottom: 14px; }
.download-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-bright);
  margin-bottom: 8px;
}
.download-card p {
  font-size: 0.875rem;
  color: var(--text-dim);
  margin-bottom: 24px;
}
.dl-actions { display: flex; align-items: center; justify-content: center; gap: 12px; flex-wrap: wrap; }
.dl-badge {
  font-size: 0.75rem;
  color: var(--text-dim);
  background: rgba(160,180,200,0.08);
  border: 1px solid rgba(160,180,200,0.15);
  border-radius: 6px;
  padding: 4px 10px;
}

/* ======== FAQ ======== */
.faq-list {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.faq-item { overflow: hidden; }
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  background: transparent;
  color: var(--text-bright);
  font-size: 0.92rem;
  font-weight: 600;
  text-align: left;
  transition: background 0.2s;
}
.faq-question:hover { background: rgba(233,69,96,0.05); }
.faq-arrow {
  font-size: 0.75rem;
  color: var(--text-dim);
  transition: transform 0.3s var(--ease-out);
  flex-shrink: 0;
}
.faq-item.open .faq-arrow { transform: rotate(90deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s var(--ease-out), padding 0.35s;
}
.faq-item.open .faq-answer {
  max-height: 300px;
}
.faq-answer p {
  padding: 0 20px 16px;
  font-size: 0.875rem;
  color: var(--text-dim);
  line-height: 1.8;
}

/* ======== Footer ======== */
#footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid rgba(233,69,96,0.08);
  padding: 36px 24px;
}
.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}
.footer-brand { display: flex; flex-direction: column; gap: 4px; }
.footer-logo {
  font-size: 1rem;
  font-weight: 700;
  color: var(--accent);
}
.footer-brand p { font-size: 0.78rem; color: var(--text-dim); }
.footer-links { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.footer-links a, .footer-links span {
  font-size: 0.78rem;
  color: var(--text-dim);
  transition: color 0.2s;
}
.footer-links a:hover { color: var(--accent); }
.footer-sep { opacity: 0.35; }

/* ======== Lightbox ======== */
.lightbox-overlay {
  position: fixed;
  inset: 0;
  z-index: 3000;
  background: rgba(10, 14, 26, 0.92);
  backdrop-filter: blur(12px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
  cursor: zoom-out;
}
.lightbox-overlay.show { opacity: 1; pointer-events: all; }
.lightbox-close {
  position: absolute;
  top: 20px; right: 24px;
  width: 40px; height: 40px;
  border-radius: 50%;
  background: rgba(160,180,200,0.08);
  color: var(--text-dim);
  font-size: 1.2rem;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  z-index: 3001;
  transition: background 0.2s, color 0.2s;
}
.lightbox-close:hover { background: rgba(233,69,96,0.15); color: var(--accent); }
.lightbox-content {
  max-width: min(90vw, 900px);
  max-height: 90vh;
  cursor: default;
}
.lightbox-content img {
  width: 100%;
  height: auto;
  max-height: 85vh;
  object-fit: contain;
  border-radius: 16px;
  box-shadow: 0 24px 80px rgba(0,0,0,0.60);
  border: 1px solid rgba(233,69,96,0.15);
}

/* ======== Tooltip ======== */
.tooltip-overlay {
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(10, 14, 26, 0.80);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}
.tooltip-overlay.show { opacity: 1; pointer-events: all; }
.tooltip-box {
  position: relative;
  background: var(--glass-bg);
  border: 1px solid rgba(233,69,96,0.25);
  border-radius: var(--radius);
  backdrop-filter: blur(20px);
  padding: 32px 28px;
  max-width: 340px;
  text-align: center;
  box-shadow: 0 20px 60px rgba(0,0,0,0.50);
  transform: scale(0.92) translateY(12px);
  transition: transform 0.3s var(--ease-out);
}
.tooltip-overlay.show .tooltip-box { transform: scale(1) translateY(0); }
.tooltip-close {
  position: absolute;
  top: 12px; right: 12px;
  width: 28px; height: 28px;
  border-radius: 50%;
  background: rgba(160,180,200,0.08);
  color: var(--text-dim);
  font-size: 0.85rem;
  display: flex; align-items: center; justify-content: center;
  transition: background 0.2s, color 0.2s;
}
.tooltip-close:hover { background: rgba(233,69,96,0.15); color: var(--accent); }
.tooltip-qr-placeholder { margin-bottom: 16px; }
.qr-placeholder-box {
  width: 160px; height: 160px;
  margin: 0 auto;
  border: 2px dashed rgba(233,69,96,0.30);
  border-radius: 12px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
}
.qr-icon { font-size: 2rem; }
.qr-text { font-size: 0.78rem; color: var(--text-dim); }
.tooltip-hint { font-size: 0.75rem; color: var(--text-dim); opacity: 0.6; }

/* ======== Scroll Animations ======== */
.anim-hidden { opacity: 0; transform: translateY(28px); transition: opacity 0.65s var(--ease-out), transform 0.65s var(--ease-out); }
.anim-visible { opacity: 1; transform: translateY(0); }

/* ======== Responsive ======== */
@media(max-width: 768px) {
  .nav-links {
    display: flex;
    position: absolute;
    top: var(--nav-height);
    left: 0; right: 0;
    flex-direction: column;
    gap: 0;
    background: rgba(10, 14, 26, 0.80);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(233,69,96,0.12);
    padding: 8px 0;
    max-height: 0;
    opacity: 0;
    visibility: hidden;
    overflow: hidden;
    transform: translateY(-8px);
    transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1),
                opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                transform 0.4s cubic-bezier(0.4, 0, 0.2, 1),
                visibility 0.4s;
    pointer-events: none;
  }
  .nav-links.show {
    max-height: 400px;
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    pointer-events: auto;
    border-bottom-left-radius: 20px;
    border-bottom-right-radius: 20px;
  }
  .nav-links li a {
    display: block;
    padding: 12px 24px;
    font-size: 0.9rem;
    border-bottom: 1px solid rgba(160,180,200,0.06);
  }
  .btn-download-nav { display: none; }
  .hamburger { display: flex; }
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
    padding: 40px 20px 60px;
  }
  .hero-buttons { justify-content: center; }
  .hero-title { font-size: 2rem; }
  .hero-phone { display: none; }
  .features-grid { grid-template-columns: 1fr; }
  .products-grid { grid-template-columns: 1fr; }
  .section { padding: 52px 20px; }
  .footer-inner { flex-direction: column; text-align: center; }
}
@media(min-width: 769px) and (max-width: 899px) {
  .hero-phone { display: none; }
}