/* ===== CSS Variables ===== */
:root {
    --primary: rgb(234, 117, 121);
    --primary-light: rgb(247, 168, 171);
    --primary-dark: rgb(200, 90, 94);
    --bg-cream: #FFF9F5;
    --bg-warm: #FFF5F0;
    --bg-soft: #FFFBF8;
    --text-dark: #2D2A26;
    --text-body: #5C5650;
    --text-muted: #9A938B;
    --border-light: rgba(0, 0, 0, 0.06);
    --shadow-soft: 0 4px 20px rgba(234, 117, 121, 0.1);
    --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.08);
    --shadow-glow: 0 0 40px rgba(234, 117, 121, 0.3);
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 24px;
    --transition: all 0.3s ease;
}

/* ===== Floating Particles Background ===== */
.particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.particle {
    position: absolute;
    width: 6px;
    height: 6px;
    background: var(--primary-light);
    border-radius: 50%;
    opacity: 0.4;
    animation: float-particle 15s infinite ease-in-out;
    /* 性能优化：启用GPU加速 */
    will-change: transform, opacity;
    transform: translateZ(0);
}

@keyframes float-particle {
    0%, 100% { transform: translateY(100vh) rotate(0deg); opacity: 0; }
    10% { opacity: 0.4; }
    90% { opacity: 0.4; }
    100% { transform: translateY(-100px) rotate(720deg); opacity: 0; }
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Nunito', -apple-system, sans-serif;
    background: var(--bg-cream);
    color: var(--text-dark);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
}

/* ===== Container ===== */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: 50px;
    font-weight: 700;
    font-size: 15px;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    font-family: inherit;
}

.btn-primary {
    background: var(--primary);
    color: white;
    box-shadow: 0 4px 16px rgba(234, 117, 121, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(234, 117, 121, 0.5);
}

.btn-secondary {
    background: white;
    color: var(--primary);
    border: 2px solid var(--primary);
}

.btn-secondary:hover {
    background: var(--primary);
    color: white;
}

.btn-full { width: 100%; }

.btn-sm {
    padding: 8px 16px;
    font-size: 13px;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* ===== Buttons Enhanced ===== */
.btn-glow {
    position: relative;
    overflow: hidden;
}

.btn-glow::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    animation: btn-shine 3s infinite;
}

@keyframes btn-shine {
    0% { left: -100%; }
    50%, 100% { left: 100%; }
}

.btn-ghost {
    background: transparent;
    color: var(--text-body);
    border: 2px solid var(--border-light);
}

.btn-ghost:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.btn-arrow {
    width: 18px;
    height: 18px;
    transition: transform 0.3s ease;
}

.btn:hover .btn-arrow {
    transform: translateX(4px);
}

.btn-loader {
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 12px 0;
    background: rgba(255, 249, 245, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-light);
}

.nav-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-img {
    width: 36px;
    height: 36px;
}

.logo-text {
    font-size: 22px;
    font-weight: 800;
    color: var(--primary);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 28px;
}

.nav-links a {
    color: var(--text-body);
    font-weight: 600;
    font-size: 14px;
    transition: var(--transition);
}

.nav-links a:hover {
    color: var(--primary);
}

.nav-links .nav-btn {
    background: var(--primary);
    color: white;
    padding: 10px 20px;
    border-radius: 50px;
    font-weight: 700;
}

.nav-links .nav-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(234, 117, 121, 0.4);
}

.nav-links .nav-social {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: 10px;
    background: var(--bg-warm);
    color: var(--text-muted);
    transition: var(--transition);
}

.nav-links .nav-social:hover {
    background: var(--text-dark);
    color: white;
    transform: translateY(-2px);
}

.nav-links .nav-social svg {
    flex-shrink: 0;
}

/* ===== Hero Section Enhanced ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 80px 0 40px;
    background: linear-gradient(180deg, var(--bg-cream) 0%, var(--bg-warm) 100%);
    position: relative;
    overflow: hidden;
}

.hero-glow {
    position: absolute;
    top: 50%;
    left: 30%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(234, 117, 121, 0.15) 0%, transparent 70%);
    transform: translate(-50%, -50%);
    pointer-events: none;
    animation: glow-pulse 4s ease-in-out infinite;
}

@keyframes glow-pulse {
    0%, 100% { opacity: 0.5; transform: translate(-50%, -50%) scale(1); }
    50% { opacity: 0.8; transform: translate(-50%, -50%) scale(1.1); }
}

.hero-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 40px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-left {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.character-frame {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.character-ring {
    position: absolute;
    width: 340px;
    height: 340px;
    border: 3px solid var(--primary-light);
    border-radius: 50%;
    opacity: 0.3;
    animation: ring-rotate 20s linear infinite;
}

.character-ring::before {
    content: '';
    position: absolute;
    top: -5px;
    left: 50%;
    width: 10px;
    height: 10px;
    background: var(--primary);
    border-radius: 50%;
}

@keyframes ring-rotate {
    to { transform: rotate(360deg); }
}

.hero-video {
    width: 100%;
    max-width: 320px;
    height: auto;
    filter: drop-shadow(0 20px 40px rgba(234, 117, 121, 0.2));
    /* 性能优化 */
    will-change: transform;
    transform: translateZ(0);
}

.hero-status {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    background: white;
    border-radius: 50px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-body);
    box-shadow: var(--shadow-soft);
    margin-top: -10px;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

.dot {
    width: 8px;
    height: 8px;
    background: #4ade80;
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(74, 222, 128, 0.4); }
    50% { opacity: 0.8; box-shadow: 0 0 0 8px rgba(74, 222, 128, 0); }
}

.hero-right {
    max-width: 500px;
}

.hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: white;
    border: 2px solid var(--primary);
    border-radius: 50px;
    font-size: 13px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 16px;
}

.hero-tag.floating {
    /* static, no animation */
}

.tag-icon {
    font-size: 14px;
}

.hero-title {
    font-size: 42px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 16px;
    color: var(--text-dark);
}

.title-line {
    display: block;
}

.hl {
    color: var(--primary);
}

.typewriter {
    position: relative;
}

.hero-desc {
    font-size: 17px;
    color: var(--text-body);
    margin-bottom: 24px;
    line-height: 1.7;
}

.hero-desc strong {
    color: var(--primary);
}

.hero-btns {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 24px;
}

.download-section {
    margin-bottom: 24px;
}

.download-label {
    font-size: 13px;
    color: var(--text-muted);
    text-align: center;
    margin-bottom: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.download-buttons {
    display: flex;
    gap: 10px;
    justify-content: center;
    flex-wrap: wrap;
}

.download-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    background: white;
    border: 2px solid var(--border-light);
    border-radius: 50px;
    text-decoration: none;
    color: var(--text-body);
    font-size: 14px;
    font-weight: 600;
    transition: var(--transition);
    cursor: pointer;
}

.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-soft);
    border-color: var(--primary);
    color: var(--primary);
}

.download-btn svg {
    width: 18px;
    height: 18px;
}

.download-btn.chrome:hover {
    border-color: #4285F4;
    color: #4285F4;
}

.download-btn.edge:hover {
    border-color: #0078D4;
    color: #0078D4;
}

.download-btn.firefox:hover {
    border-color: #FF7139;
    color: #FF7139;
}

.hero-social-proof {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
    color: var(--text-muted);
}

.avatars {
    display: flex;
}

.avatar {
    width: 32px;
    height: 32px;
    background: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    margin-left: -8px;
    border: 2px solid white;
    box-shadow: var(--shadow-soft);
}

.avatar:first-child {
    margin-left: 0;
}

.scroll-hint {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    color: var(--text-muted);
    animation: bounce 2s ease-in-out infinite;
}

.scroll-arrow {
    width: 20px;
    height: 20px;
    border-right: 2px solid var(--primary);
    border-bottom: 2px solid var(--primary);
    transform: rotate(45deg);
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(10px); }
}

/* ===== Pain Section ===== */
.pain-section {
    padding: 80px 0;
    background: white;
}

.section-header {
    text-align: center;
    margin-bottom: 48px;
}

.section-tag {
    display: inline-block;
    padding: 6px 14px;
    background: rgba(234, 117, 121, 0.1);
    border-radius: 50px;
    font-size: 13px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 12px;
}

.section-header h2 {
    font-size: 36px;
    font-weight: 800;
    color: var(--text-dark);
}

.section-desc {
    font-size: 16px;
    color: var(--text-muted);
    margin-top: 8px;
}

.pain-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 48px;
}

.pain-card {
    background: var(--bg-soft);
    border-radius: var(--radius-xl);
    padding: 32px 24px;
    text-align: center;
    position: relative;
    transition: var(--transition);
    cursor: default;
}

.pain-card:hover {
    transform: translateY(-8px) rotateX(2deg);
    box-shadow: var(--shadow-card);
}

.pain-icon {
    font-size: 48px;
    margin-bottom: 16px;
    display: block;
}

.pain-card h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.pain-card p {
    font-size: 14px;
    color: var(--text-body);
    line-height: 1.6;
    font-style: italic;
}

.pain-card em {
    color: var(--primary);
    font-style: italic;
}

.pain-line {
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 3px;
    background: var(--primary);
    border-radius: 2px;
    transition: width 0.3s ease;
}

.pain-card:hover .pain-line {
    width: 60%;
}

.solution-reveal {
    text-align: center;
    padding: 40px;
    background: linear-gradient(135deg, var(--bg-warm) 0%, var(--bg-cream) 100%);
    border-radius: var(--radius-xl);
    position: relative;
}

.solution-line {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 40px;
    background: linear-gradient(to bottom, var(--primary), transparent);
    margin-top: -40px;
}

.solution-tag {
    display: inline-block;
    padding: 4px 12px;
    background: var(--primary);
    color: white;
    border-radius: 50px;
    font-size: 12px;
    font-weight: 700;
    margin-bottom: 12px;
}

.solution-content h3 {
    font-size: 24px;
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.solution-content p {
    font-size: 16px;
    color: var(--text-body);
}

/* ===== Features Section Enhanced ===== */
.features-section {
    padding: 80px 0;
    background: var(--bg-warm);
}

.feature-hero {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
    margin-bottom: 48px;
    padding: 40px;
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-card);
}

.feature-badge {
    display: inline-block;
    padding: 4px 12px;
    background: var(--primary);
    color: white;
    border-radius: 50px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 12px;
}

.feature-hero-content h3 {
    font-size: 28px;
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.feature-hero-content p {
    font-size: 15px;
    color: var(--text-body);
    line-height: 1.7;
    margin-bottom: 20px;
}

.memory-demo {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.memory-item {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    background: var(--bg-soft);
    border-radius: 50px;
    font-size: 13px;
    color: var(--text-body);
    animation: memory-pop 0.5s ease calc(var(--delay) * 0.2s) both;
}

@keyframes memory-pop {
    from { opacity: 0; transform: scale(0.8); }
    to { opacity: 1; transform: scale(1); }
}

.memory-icon {
    font-size: 16px;
}

.chat-demo {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.chat-bubble {
    display: flex;
    gap: 10px;
    max-width: 90%;
    animation: chat-slide 0.4s ease both;
}

.chat-bubble.serica {
    align-self: flex-start;
}

.chat-bubble.user {
    align-self: flex-end;
    flex-direction: row-reverse;
}

@keyframes chat-slide {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.chat-avatar {
    width: 36px;
    height: 36px;
    background: var(--bg-soft);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    flex-shrink: 0;
    overflow: hidden;
}

.chat-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.chat-text {
    padding: 12px 16px;
    border-radius: 18px;
    font-size: 14px;
    line-height: 1.5;
}

.chat-bubble.serica .chat-text {
    background: var(--bg-soft);
    color: var(--text-dark);
    border-bottom-left-radius: 4px;
}

.chat-bubble.user .chat-text {
    background: var(--primary);
    color: white;
    border-bottom-right-radius: 4px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.feature-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: 28px 24px;
    text-align: center;
    transition: var(--transition);
    cursor: default;
}

.feature-card:hover {
    transform: translateY(-6px) scale(1.02);
    box-shadow: var(--shadow-card);
}

.feature-icon-wrap {
    position: relative;
    display: inline-block;
    margin-bottom: 16px;
}

.feature-icon {
    font-size: 40px;
    display: block;
    position: relative;
    z-index: 1;
}

.icon-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60px;
    height: 60px;
    background: radial-gradient(circle, rgba(234, 117, 121, 0.2) 0%, transparent 70%);
    border-radius: 50%;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.feature-card:hover .icon-glow {
    opacity: 1;
}

.feature-card h4 {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.feature-card p {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.5;
}

/* ===== Journey Section Enhanced ===== */
.journey-section {
    padding: 80px 0;
    background: white;
}

.journey-timeline {
    position: relative;
    padding: 40px 0;
}

.journey-track {
    position: absolute;
    top: 50%;
    left: 10%;
    right: 10%;
    height: 4px;
    background: var(--border-light);
    border-radius: 2px;
    transform: translateY(-50%);
}

.journey-progress {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 20%;
    background: linear-gradient(90deg, var(--primary), var(--primary-light));
    border-radius: 2px;
    transition: width 0.5s ease;
}

.journey-stages {
    display: flex;
    justify-content: space-between;
    position: relative;
    z-index: 1;
}

.stage {
    display: flex;
    flex-direction: column;
    align-items: center;
    cursor: pointer;
    transition: var(--transition);
}

.stage-dot {
    width: 20px;
    height: 20px;
    background: white;
    border: 3px solid var(--border-light);
    border-radius: 50%;
    margin-bottom: 16px;
    transition: var(--transition);
}

.stage.active .stage-dot,
.stage:hover .stage-dot {
    border-color: var(--primary);
    background: var(--primary);
    box-shadow: 0 0 0 6px rgba(234, 117, 121, 0.2);
}

.stage-content {
    text-align: center;
    padding: 20px;
    background: var(--bg-soft);
    border-radius: var(--radius-lg);
    min-width: 140px;
    transition: var(--transition);
}

.stage.active .stage-content,
.stage:hover .stage-content {
    background: white;
    box-shadow: var(--shadow-card);
    transform: translateY(-4px);
}

.stage-emoji {
    font-size: 32px;
    display: block;
    margin-bottom: 8px;
}

.stage-content h4 {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 4px;
}

.stage-quote {
    font-size: 12px;
    color: var(--text-muted);
    font-style: italic;
}

.journey-cta {
    text-align: center;
    margin-top: 32px;
    font-size: 15px;
    color: var(--text-body);
}

/* ===== Compare Section Enhanced ===== */
.compare-section {
    padding: 80px 0;
    background: var(--bg-warm);
}

.compare-visual {
    display: flex;
    align-items: stretch;
    justify-content: center;
    gap: 24px;
    max-width: 800px;
    margin: 0 auto;
}

.compare-card {
    flex: 1;
    background: white;
    border-radius: var(--radius-xl);
    padding: 32px 28px;
    transition: var(--transition);
}

.compare-card.others {
    opacity: 0.7;
}

.compare-card.serica {
    border: 3px solid var(--primary);
    box-shadow: var(--shadow-glow);
    transform: scale(1.05);
}

.compare-header {
    text-align: center;
    margin-bottom: 24px;
    position: relative;
}

.compare-icon {
    font-size: 40px;
    display: block;
    margin-bottom: 8px;
    width: 50px;
    height: 50px;
    margin-left: auto;
    margin-right: auto;
}

.compare-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.compare-header h3 {
    font-size: 20px;
    font-weight: 800;
    color: var(--text-dark);
}

.winner-badge {
    position: absolute;
    top: -8px;
    right: -8px;
    background: #4ade80;
    color: white;
    padding: 4px 10px;
    border-radius: 50px;
    font-size: 11px;
    font-weight: 700;
}

.compare-list {
    list-style: none;
}

.compare-list li {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 0;
    font-size: 14px;
    color: var(--text-body);
    border-bottom: 1px solid var(--border-light);
}

.compare-list li:last-child {
    border-bottom: none;
}

.compare-list .x {
    color: #ef4444;
    font-weight: 700;
}

.compare-list .check {
    color: #4ade80;
    font-weight: 700;
}

.compare-vs {
    display: flex;
    align-items: center;
    font-size: 24px;
    font-weight: 800;
    color: var(--text-muted);
}


/* ===== Pricing Section Enhanced ===== */
.pricing-section {
    padding: 80px 0;
    background: white;
}

.period-toggle {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 40px;
}

.period-btn {
    padding: 12px 24px;
    border: 2px solid var(--border-light);
    border-radius: 50px;
    background: white;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.period-btn:hover {
    border-color: var(--primary-light);
}

.period-btn.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.save-tag {
    background: #4ade80;
    color: white;
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 11px;
    font-weight: 700;
}

.pricing-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    max-width: 960px;
    margin: 0 auto 40px;
}

.pricing-card {
    background: var(--bg-soft);
    border-radius: var(--radius-xl);
    padding: 32px 28px;
    text-align: center;
    position: relative;
    transition: var(--transition);
    border: 2px solid transparent;
}

.pricing-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-card);
}

.pricing-card.featured {
    background: white;
    border-color: var(--primary);
    box-shadow: var(--shadow-glow);
    transform: scale(1.05);
}

.pricing-card.featured:hover {
    transform: scale(1.05) translateY(-8px);
}

.pricing-badge {
    position: absolute;
    top: -14px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary);
    color: white;
    padding: 6px 16px;
    border-radius: 50px;
    font-size: 12px;
    font-weight: 700;
}

.pricing-header h3 {
    font-size: 22px;
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: 4px;
}

.pricing-tagline {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.pricing-price {
    margin-bottom: 8px;
}

.price-amount {
    font-size: 42px;
    font-weight: 800;
    color: var(--primary);
}

.price-period {
    font-size: 14px;
    color: var(--text-muted);
}

.pricing-promo {
    font-size: 13px;
    color: #4ade80;
    font-weight: 600;
    margin-bottom: 8px;
}

.pricing-credits {
    font-size: 14px;
    color: var(--text-body);
    padding: 10px 16px;
    background: rgba(234, 117, 121, 0.08);
    border-radius: var(--radius-md);
    margin-bottom: 20px;
}

.pricing-features {
    list-style: none;
    text-align: left;
    margin-bottom: 24px;
}

.pricing-features li {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 0;
    font-size: 14px;
    color: var(--text-body);
    border-bottom: 1px solid var(--border-light);
}

.pricing-features li:last-child {
    border-bottom: none;
}

.pricing-features .check {
    color: #4ade80;
    font-weight: 700;
}

.pricing-features strong {
    color: var(--primary);
}

.pricing-extras {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    max-width: 700px;
    margin: 0 auto;
}

.extra-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px 24px;
    background: var(--bg-soft);
    border-radius: var(--radius-lg);
}

.extra-icon {
    font-size: 28px;
}

.extra-info {
    flex: 1;
}

.extra-info strong {
    display: block;
    font-size: 14px;
    color: var(--text-dark);
    margin-bottom: 2px;
}

.extra-info span {
    font-size: 13px;
    color: var(--text-muted);
}

.redeem-form {
    display: flex;
    gap: 8px;
}

.redeem-form input {
    padding: 8px 14px;
    border: 2px solid var(--border-light);
    border-radius: 50px;
    font-size: 13px;
    width: 120px;
    font-family: inherit;
    transition: var(--transition);
}

.redeem-form input:focus {
    outline: none;
    border-color: var(--primary);
}

/* ===== Login Section Enhanced ===== */
.login-section {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--bg-warm) 0%, var(--bg-cream) 100%);
}

.login-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    max-width: 900px;
    margin: 0 auto;
}

.login-visual {
    text-align: center;
}

.login-video {
    width: 100%;
    max-width: 280px;
    margin: 0 auto;
    filter: drop-shadow(0 20px 40px rgba(234, 117, 121, 0.2));
}

.login-bubble {
    background: white;
    border-radius: var(--radius-lg);
    padding: 16px 24px;
    margin-top: 16px;
    display: inline-block;
    font-size: 15px;
    color: var(--text-body);
    font-style: italic;
    box-shadow: var(--shadow-soft);
    transition: opacity 0.3s ease;
}

.login-form-wrap {
    background: white;
    border-radius: var(--radius-xl);
    padding: 40px;
    box-shadow: var(--shadow-card);
}

.login-header {
    text-align: center;
    margin-bottom: 28px;
}

.login-header h2 {
    font-size: 28px;
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.login-header p {
    font-size: 14px;
    color: var(--text-muted);
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.input-group {
    position: relative;
}

.input-group input {
    width: 100%;
    padding: 16px 20px;
    padding-right: 50px;
    border: 2px solid var(--border-light);
    border-radius: var(--radius-md);
    font-size: 15px;
    font-family: inherit;
    transition: var(--transition);
}

.input-group input:focus {
    outline: none;
    border-color: var(--primary);
}

.input-group input:disabled {
    background: var(--bg-soft);
    color: var(--text-muted);
}

.input-icon {
    position: absolute;
    right: 18px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 18px;
}

.forgot-password-link {
    display: block;
    margin-top: 8px;
    text-align: right;
    font-size: 13px;
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
}

.forgot-password-link:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

/* 发送验证码按钮 */
.send-code-btn {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    padding: 8px 14px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}

.send-code-btn:hover:not(:disabled) {
    background: var(--primary-dark);
}

.send-code-btn:disabled {
    background: var(--text-muted);
    cursor: not-allowed;
}

/* 有发送按钮时，输入框右侧留更多空间 */
#vcode-group input {
    padding-right: 100px;
}

.login-bonus {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-top: 24px;
    padding: 14px;
    background: rgba(234, 117, 121, 0.1);
    border-radius: var(--radius-md);
    font-size: 14px;
    color: var(--text-body);
}

.bonus-icon {
    font-size: 20px;
}

.login-bonus strong {
    color: var(--primary);
}

/* ===== Footer Enhanced ===== */
.footer {
    padding: 24px;
    background: var(--bg-soft);
    border-top: 1px solid var(--border-light);
}

.footer-content {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 14px;
    color: var(--text-muted);
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-links a {
    color: var(--text-body);
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--primary);
}

/* ===== Toast Enhanced ===== */
.toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: white;
    border-radius: 50px;
    padding: 14px 24px;
    box-shadow: var(--shadow-card);
    z-index: 2000;
    opacity: 0;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 10px;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

.toast.success {
    border: 2px solid #4ade80;
}

.toast.error {
    border: 2px solid #ef4444;
}

.toast-icon {
    font-size: 18px;
}

.toast-msg {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-dark);
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-left {
        order: -1;
    }

    .hero-right {
        max-width: 100%;
    }

    .hero-btns {
        justify-content: center;
    }

    .hero-social-proof {
        justify-content: center;
    }

    .scroll-hint {
        display: none;
    }

    .pain-cards {
        grid-template-columns: 1fr;
        max-width: 400px;
        margin-left: auto;
        margin-right: auto;
    }

    .feature-hero {
        grid-template-columns: 1fr;
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .journey-track {
        display: none;
    }

    .journey-stages {
        flex-wrap: wrap;
        gap: 16px;
        justify-content: center;
    }

    .stage {
        flex: 0 0 calc(50% - 8px);
    }

    .stage-dot {
        display: none;
    }

    .compare-visual {
        flex-direction: column;
    }

    .compare-vs {
        transform: rotate(90deg);
    }

    .compare-card.serica {
        transform: scale(1);
        order: -1;
    }

    .pricing-cards {
        grid-template-columns: 1fr;
        max-width: 360px;
    }

    .pricing-card.featured {
        transform: scale(1);
    }

    .pricing-extras {
        grid-template-columns: 1fr;
    }

    .login-wrapper {
        grid-template-columns: 1fr;
    }

    .login-visual {
        display: none;
    }

    .footer-content {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
}

@media (max-width: 600px) {
    .nav-links a:not(.nav-btn):not(.nav-social) {
        display: none;
    }
    
    .nav-links .nav-social {
        width: 34px;
        height: 34px;
    }
    
    .nav-links {
        gap: 12px;
    }

    .hero-title {
        font-size: 32px;
    }

    .section-header h2 {
        font-size: 28px;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .journey-stages {
        flex-direction: column;
    }

    .stage {
        flex: 0 0 100%;
        max-width: 200px;
    }

    .period-toggle {
        flex-wrap: wrap;
    }

    .extra-card {
        flex-wrap: wrap;
        justify-content: center;
        text-align: center;
    }

    .redeem-form {
        width: 100%;
        justify-content: center;
    }

    .login-form-wrap {
        padding: 24px;
    }
}

/* ===== Login Success State ===== */
.login-success {
    text-align: center;
    padding: 20px 0;
}

.login-success .success-icon {
    font-size: 64px;
    margin-bottom: 16px;
    animation: success-bounce 0.6s ease;
}

@keyframes success-bounce {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.2); }
}

.login-success h2 {
    font-size: 24px;
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.login-success p {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 24px;
}

.login-success .credits-display {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 16px 32px;
    background: linear-gradient(135deg, var(--bg-warm) 0%, var(--bg-cream) 100%);
    border-radius: var(--radius-lg);
    margin-bottom: 24px;
    border: 2px solid var(--primary-light);
}

.login-success .credits-icon {
    font-size: 24px;
}

.login-success .credits-value {
    font-size: 32px;
    font-weight: 800;
    color: var(--primary);
}

.login-success .credits-label {
    font-size: 14px;
    color: var(--text-muted);
}

.login-success .action-buttons {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}

/* ===== Selection ===== */
::selection {
    background: var(--primary);
    color: white;
}

/* ===== Scroll Reveal Animations ===== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===== Tilt Effect ===== */
[data-tilt] {
    transform-style: preserve-3d;
    transform: perspective(1000px);
}

/* ===== Onboarding Guide Styles ===== */
.onboarding-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.75);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.3s ease;
    backdrop-filter: blur(8px);
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.onboarding-modal {
    width: 440px;
    max-width: 92vw;
    max-height: 90vh;
    background: white;
    border-radius: 24px;
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.5);
    border: 1px solid var(--border-light);
    overflow: hidden;
    animation: modalSlideIn 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    display: flex;
    flex-direction: column;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: scale(0.9) translateY(20px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.onboarding-header {
    background: linear-gradient(135deg, var(--primary), #ec4899);
    padding: 32px 24px;
    text-align: center;
    position: relative;
    flex-shrink: 0;
}

.onboarding-avatar {
    width: 88px;
    height: 88px;
    border-radius: 50%;
    border: 4px solid rgba(255, 255, 255, 0.3);
    margin-bottom: 16px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
    background: white;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-left: auto;
    margin-right: auto;
    overflow: hidden;
}

.onboarding-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
}

.onboarding-title {
    font-size: 26px;
    font-weight: 700;
    color: white;
    margin-bottom: 8px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.onboarding-subtitle {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.5;
}

.onboarding-body {
    padding: 24px;
    flex: 1;
    overflow-y: auto;
    min-height: 0;
    max-height: none;
}

.onboarding-body::-webkit-scrollbar {
    width: 6px;
}

.onboarding-body::-webkit-scrollbar-track {
    background: var(--bg-soft);
    border-radius: 10px;
}

.onboarding-body::-webkit-scrollbar-thumb {
    background: var(--primary-light);
    border-radius: 10px;
}

.onboarding-body::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}

.onboarding-step {
    display: none;
}

.onboarding-step.active {
    display: block;
    animation: stepFadeIn 0.3s ease;
}

@keyframes stepFadeIn {
    from {
        opacity: 0;
        transform: translateX(20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.onboarding-feature {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 16px;
    background: rgba(234, 117, 121, 0.1);
    border-radius: 16px;
    margin-bottom: 12px;
    transition: all 0.2s ease;
    border: 1px solid rgba(234, 117, 121, 0.15);
}

.onboarding-feature:hover {
    background: rgba(234, 117, 121, 0.15);
    transform: translateX(4px);
}

.onboarding-feature:last-child {
    margin-bottom: 0;
}

.onboarding-feature-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary), #ec4899);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    flex-shrink: 0;
    box-shadow: 0 4px 12px rgba(234, 117, 121, 0.3);
}

.onboarding-feature-content {
    flex: 1;
}

.onboarding-feature-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 4px;
}

.onboarding-feature-desc {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.5;
}

.onboarding-welcome-text {
    text-align: center;
    padding: 20px 0;
}

.onboarding-welcome-text p {
    font-size: 15px;
    color: var(--text-muted);
    line-height: 1.8;
    margin-bottom: 12px;
}

.onboarding-welcome-text p:last-child {
    margin-bottom: 0;
}

.onboarding-highlight {
    color: var(--primary);
    font-weight: 600;
}

.onboarding-footer {
    padding: 20px 24px;
    border-top: 1px solid var(--border-light);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: white;
    flex-shrink: 0;
    position: relative;
    z-index: 10;
}

.onboarding-dots {
    display: flex;
    gap: 8px;
}

.onboarding-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--border-light);
    transition: all 0.3s ease;
}

.onboarding-dot.active {
    background: var(--primary);
    width: 24px;
    border-radius: 4px;
}

.onboarding-actions {
    display: flex;
    gap: 12px;
}

.onboarding-btn {
    padding: 12px 24px;
    border: none;
    border-radius: 12px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
}

.onboarding-btn-skip {
    background: transparent;
    color: var(--text-muted);
}

.onboarding-btn-skip:hover {
    color: var(--text-dark);
    background: rgba(0, 0, 0, 0.05);
}

.onboarding-btn-next {
    background: linear-gradient(135deg, var(--primary), #ec4899);
    color: white;
    box-shadow: 0 4px 12px rgba(234, 117, 121, 0.3);
}

.onboarding-btn-next:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(234, 117, 121, 0.4);
}

.onboarding-btn-next:active {
    transform: translateY(0);
}

.onboarding-tip {
    margin-top: 12px;
    padding: 14px 16px;
    background: rgba(245, 158, 11, 0.1);
    border-radius: 12px;
    border-left: 3px solid var(--warning);
}

.onboarding-tip-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--warning);
    margin-bottom: 4px;
}

.onboarding-tip-text {
    font-size: 12px;
    color: var(--text-muted);
    line-height: 1.5;
}