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

:root {
    --white: #ffffff;
    --black: #000000;
    --gray-50: #fafafa;
    --gray-100: #f5f5f5;
    --gray-200: #e5e5e5;
    --gray-300: #d4d4d4;
    --gray-400: #a3a3a3;
    --gray-500: #737373;
    --gray-600: #525252;
    --gray-900: #171717;
    --purple-light: #f3e8ff;
    --purple-50: #faf5ff;
    --blue-light: #e0f2fe;
    --blue-50: #eff6ff;
    --red-500: #ef4444;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: "Roboto Serif", "Roboto Serif Placeholder", serif;
    background: var(--white);
    color: var(--gray-900);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* Navigation - Floating Pill Style */
.nav {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1000;
}

.nav-pill {
    display: flex;
    align-items: center;
    gap: 40px;
    padding: 12px 12px 12px 20px;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: 100px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--black);
    font-weight: 700;
    font-size: 18px;
}

.logo-icon {
    display: flex;
    align-items: center;
    gap: 2px;
    padding: 6px 8px;
    background: var(--black);
    border-radius: 8px;
}

.logo-icon.dark {
    background: var(--white);
    border: 1px solid var(--gray-200);
}

.logo-icon.dark .bar {
    background: var(--black);
}

.logo-icon .bar {
    width: 3px;
    background: var(--white);
    border-radius: 2px;
}

.logo-icon .bar:nth-child(1) { height: 6px; }
.logo-icon .bar:nth-child(2) { height: 12px; }
.logo-icon .bar:nth-child(3) { height: 6px; }

.nav-links {
    display: flex;
    align-items: center;
    gap: 24px;
}

.nav-links a {
    color: var(--gray-600);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.2s;
}

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

.btn-download {
    background: var(--black) !important;
    color: var(--white) !important;
    padding: 10px 20px !important;
    border-radius: 100px !important;
}

.btn-download:hover {
    opacity: 0.9;
}

.lang-switch {
    background: transparent;
    border: 1px solid var(--gray-300);
    color: var(--gray-600);
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    font-family: inherit;
}

.lang-switch:hover {
    border-color: var(--black);
    color: var(--black);
}

.github-link {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-500);
    transition: color 0.2s;
}

.github-link:hover {
    color: var(--black);
}

.github-link svg {
    width: 20px;
    height: 20px;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 120px 24px 60px;
    text-align: center;
}

.hero h1 {
    font-size: clamp(48px, 10vw, 96px);
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1;
    margin-bottom: 24px;
}

.hero-desc {
    font-size: 18px;
    color: var(--gray-500);
    line-height: 1.7;
    margin-bottom: 40px;
    max-width: 600px;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--black);
    color: var(--white);
    padding: 16px 32px;
    border-radius: 100px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s;
}

.btn-primary:hover {
    transform: scale(1.02);
    box-shadow: 0 8px 30px rgba(0,0,0,0.2);
}

.btn-primary.large {
    padding: 18px 40px;
    font-size: 17px;
}

/* Demo Card */
.demo-wrapper {
    margin-top: 60px;
    padding: 40px;
    background: linear-gradient(180deg, var(--purple-50) 0%, var(--blue-50) 100%);
    border-radius: 32px;
    width: 100%;
    max-width: 700px;
}

.demo-card {
    background: var(--white);
    border-radius: 16px;
    padding: 20px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.1);
}

.demo-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.waveform {
    display: flex;
    align-items: center;
    gap: 3px;
}

.waveform span {
    width: 4px;
    background: var(--red-500);
    border-radius: 2px;
    animation: wave 0.8s ease-in-out infinite;
}

.waveform span:nth-child(1) { height: 8px; animation-delay: 0s; }
.waveform span:nth-child(2) { height: 16px; animation-delay: 0.1s; }
.waveform span:nth-child(3) { height: 24px; animation-delay: 0.2s; }
.waveform span:nth-child(4) { height: 16px; animation-delay: 0.3s; }
.waveform span:nth-child(5) { height: 8px; animation-delay: 0.4s; }

@keyframes wave {
    0%, 100% { transform: scaleY(1); }
    50% { transform: scaleY(0.5); }
}

.demo-status {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--gray-500);
}

.status-dot {
    width: 8px;
    height: 8px;
    background: var(--red-500);
    border-radius: 50%;
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.demo-text {
    font-size: 15px;
    color: var(--gray-900);
    padding: 12px;
    background: var(--gray-50);
    border-radius: 8px;
    min-height: 48px;
}

.cursor {
    display: inline-block;
    width: 2px;
    height: 18px;
    background: var(--black);
    margin-left: 2px;
    animation: blink 1s infinite;
    vertical-align: middle;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

/* Feature Sections - Stacked Cards */
.feature-sections-wrapper {
    position: relative;
    padding: 0 40px;
}

.feature-section {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 80px;
    padding: 100px 40px;
    min-height: 500px;
    margin: 0 40px 30px;
    border-radius: 40px;
    position: relative;
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Card 1: 按住即录 */
.feature-section.light-purple {
    background: linear-gradient(135deg, #faf5ff 0%, #f3e8ff 100%);
    z-index: 3;
    transform: translateY(0) scale(1);
    opacity: 0;
}

.feature-section.light-purple.revealed {
    opacity: 1;
    transform: translateY(0) scale(1);
}

/* Card 2: 光标即目标 */
.feature-section.light-blue {
    background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
    z-index: 2;
    transform: translateY(-60px) scale(0.95);
    opacity: 0;
}

.feature-section.light-blue.revealed {
    opacity: 1;
    transform: translateY(0) scale(1);
}

/* Card 3: 速度对比 */
.speed-section {
    background: var(--gray-900);
    color: var(--white);
    margin: 0 40px 30px;
    border-radius: 40px;
    padding: 80px 40px;
    overflow: hidden;
    z-index: 1;
    position: relative;
    transform: translateY(-120px) scale(0.9);
    opacity: 0;
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.speed-section.revealed {
    opacity: 1;
    transform: translateY(0) scale(1);
}

.feature-content {
    max-width: 400px;
}

.feature-content h2 {
    font-size: 42px;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 20px;
    line-height: 1.2;
}

.feature-content p {
    font-size: 17px;
    color: var(--gray-500);
    line-height: 1.8;
}

/* Key Demo */
.key-demo {
    text-align: center;
}

.key-cap {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    background: var(--white);
    border: 2px solid var(--gray-200);
    border-radius: 16px;
    font-size: 24px;
    font-weight: 600;
    box-shadow: 0 4px 0 var(--gray-200);
    animation: keyPress 2s infinite;
}

@keyframes keyPress {
    0%, 40%, 100% { transform: translateY(0); box-shadow: 0 4px 0 var(--gray-200); }
    50%, 90% { transform: translateY(4px); box-shadow: 0 0 0 var(--gray-200); }
}

.key-hint {
    margin-top: 16px;
    font-size: 14px;
    color: var(--gray-400);
}

/* Cursor Demo */
.cursor-demo {
    display: flex;
    flex-direction: column;
    gap: 16px;
    align-items: center;
}

.fake-input {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: 8px;
    padding: 12px 16px;
    font-size: 14px;
    min-width: 240px;
}

.prefix {
    color: var(--gray-400);
}

.input-cursor {
    display: inline-block;
    width: 2px;
    height: 16px;
    background: var(--black);
    animation: blink 1s infinite;
    vertical-align: middle;
}

.arrow-down {
    color: var(--gray-300);
    display: flex;
    justify-content: center;
}

.fake-input.filled .typed {
    color: var(--gray-900);
}

/* Removes Filler Section */
.feature-section.light-lavender {
    background: linear-gradient(135deg, #f5f3ff 0%, #ede9fe 100%);
    opacity: 0;
    transform: translateY(40px);
}

.feature-section.light-lavender.revealed {
    opacity: 1;
    transform: translateY(0) scale(1);
}

.feature-section.light-gray {
    background: linear-gradient(135deg, #f5f5f5 0%, #e5e5e5 100%);
    opacity: 0;
    transform: translateY(40px);
}

.feature-section.light-gray.revealed {
    opacity: 1;
    transform: translateY(0) scale(1);
}

.filler-demo {
    display: flex;
    flex-direction: column;
    gap: 16px;
    max-width: 400px;
}

.filler-card {
    background: var(--white);
    border-radius: 16px;
    padding: 16px 20px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
}

.filler-card.original {
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.filler-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, #a78bfa 0%, #c084fc 100%);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    flex-shrink: 0;
}

.filler-text {
    font-size: 15px;
    line-height: 1.6;
    color: var(--gray-900);
}

.filler-text .strikethrough {
    color: #ef4444;
    text-decoration: line-through;
    background: rgba(239, 68, 68, 0.1);
    padding: 2px 4px;
    border-radius: 4px;
}

.filler-text.clean {
    padding: 4px 0;
}

.filler-arrow {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: #a78bfa;
}

.filler-badge {
    background: linear-gradient(135deg, #a78bfa 0%, #c084fc 100%);
    color: white;
    padding: 8px 16px;
    border-radius: 100px;
    font-size: 13px;
    font-weight: 600;
}

.filler-card.result {
    border: 2px solid #a78bfa;
}

/* Hot Words Section */
.hotwords-demo {
    width: 320px;
}

.hotwords-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.hotwords-header span {
    font-size: 16px;
    font-weight: 600;
    color: var(--gray-900);
}

.hotwords-add {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: none;
    background: var(--gray-200);
    color: var(--gray-600);
    font-size: 20px;
    cursor: pointer;
    transition: all 0.2s;
}

.hotwords-add:hover {
    background: var(--gray-300);
}

.hotwords-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.hotword-item {
    background: linear-gradient(135deg, 
        rgba(80, 80, 80, calc(0.9 - var(--delay) * 0.15)) 0%, 
        rgba(60, 60, 60, calc(0.9 - var(--delay) * 0.15)) 100%);
    color: white;
    padding: 16px 20px;
    border-radius: 12px;
    font-size: 15px;
    font-weight: 500;
    transform: translateX(calc(var(--delay) * 8px));
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

.hotwords-link {
    display: inline-block;
    margin-top: 24px;
    color: #6366f1;
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s;
}

.hotwords-link:hover {
    color: #4f46e5;
    transform: translateX(4px);
}

/* Platforms Section */
.platforms-section {
    background: var(--gray-900);
    color: var(--white);
    padding: 100px 40px 120px;
    margin: 0 40px 30px;
    border-radius: 40px;
    text-align: center;
    overflow: hidden;
}

.platforms-section h2 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 16px;
}

.platforms-section > p {
    font-size: 18px;
    color: var(--gray-400);
    margin-bottom: 60px;
}

.app-icons-wrapper {
    display: flex;
    flex-direction: column;
    gap: 16px;
    overflow: hidden;
    mask-image: linear-gradient(to right, transparent, black 5%, black 95%, transparent);
    -webkit-mask-image: linear-gradient(to right, transparent, black 5%, black 95%, transparent);
}

.app-icons-track {
    width: 100%;
    overflow: hidden;
}

.app-icons-row {
    display: flex;
    gap: 12px;
    width: max-content;
    animation: scrollIcons 25s linear infinite;
}

.app-icons-track.reverse .app-icons-row {
    animation: scrollIconsReverse 25s linear infinite;
}

@keyframes scrollIcons {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

@keyframes scrollIconsReverse {
    0% { transform: translateX(-50%); }
    100% { transform: translateX(0); }
}

.app-icon {
    width: 52px;
    height: 52px;
    flex-shrink: 0;
    border-radius: 12px;
    transition: transform 0.3s;
}

.app-icon:hover {
    transform: scale(1.15);
}

/* Speed Section */
.speed-intro {
    text-align: center;
    margin-bottom: 60px;
}

.speed-intro p {
    font-size: 18px;
    color: var(--gray-400);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.8;
}

.speed-comparison {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 60px;
    max-width: 700px;
    margin: 0 auto;
}

.speed-item {
    text-align: center;
    padding: 40px;
}

.speed-item .speed-number {
    font-size: 80px;
    font-weight: 800;
    line-height: 1;
    color: var(--white);
    opacity: 0.5;
}

.speed-item.highlight .speed-number {
    font-size: 96px;
    opacity: 1;
    background: linear-gradient(135deg, #818cf8, #c084fc);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.speed-meta {
    display: flex;
    flex-direction: column;
    gap: 4px;
    margin-top: 12px;
}

.speed-unit {
    font-size: 16px;
    color: var(--gray-400);
    font-weight: 500;
}

.speed-label {
    font-size: 14px;
    color: var(--gray-500);
}

.speed-vs {
    font-size: 18px;
    color: var(--gray-500);
    font-weight: 500;
}

.speed-badge {
    display: inline-block;
    margin-top: 16px;
    padding: 8px 16px;
    background: linear-gradient(135deg, rgba(129, 140, 248, 0.2), rgba(192, 132, 252, 0.2));
    border: 1px solid rgba(129, 140, 248, 0.3);
    border-radius: 100px;
    font-size: 13px;
    font-weight: 500;
    color: #a78bfa;
}

/* Quote Section */
.quote-section {
    padding: 120px 40px;
    text-align: center;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 40px;
}

.quote-mark {
    color: var(--gray-200);
    flex-shrink: 0;
}

.quote-mark.right svg {
    transform: rotate(180deg);
}

.quote-section h2 {
    font-size: clamp(36px, 6vw, 56px);
    font-weight: 700;
    letter-spacing: -0.02em;
}

/* Features Grid */
.features-grid-section {
    padding: 100px 40px;
    text-align: center;
}

.features-grid-section h2 {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 60px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px;
    max-width: 1000px;
    margin: 0 auto;
}

.feature-item {
    text-align: left;
    padding: 32px;
    background: var(--gray-50);
    border-radius: 20px;
    transition: all 0.3s;
}

.feature-item:hover {
    background: var(--white);
    box-shadow: 0 10px 40px rgba(0,0,0,0.1);
    transform: translateY(-4px);
}

.feature-icon {
    width: 40px;
    height: 40px;
    margin-bottom: 16px;
    color: var(--gray-600);
}

.feature-icon svg {
    width: 100%;
    height: 100%;
}

.feature-item h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
}

.feature-item p {
    font-size: 14px;
    color: var(--gray-500);
}

/* How Section */
.how-section {
    padding: 100px 40px;
    text-align: center;
    background: var(--gray-50);
}

.how-section h2 {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 60px;
}

.steps {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 40px;
    max-width: 800px;
    margin: 0 auto;
}

.step {
    flex: 1;
    text-align: center;
}

.step-num {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--black);
    color: var(--white);
    border-radius: 50%;
    font-size: 18px;
    font-weight: 700;
    margin: 0 auto 20px;
}

.step h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
}

.step p {
    font-size: 14px;
    color: var(--gray-500);
}

.step-arrow {
    color: var(--gray-300);
    display: flex;
    align-items: center;
}

/* CTA Section */
.cta-section {
    padding: 120px 40px;
    text-align: center;
}

.cta-section h2 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 16px;
}

.cta-section > p {
    font-size: 18px;
    color: var(--gray-500);
    margin-bottom: 40px;
}

.cta-meta {
    margin-top: 24px;
    font-size: 13px;
    color: var(--gray-400);
}

.system-requirements {
    margin-top: 32px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    align-items: center;
}

.requirement-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--gray-500);
}

.requirement-item svg {
    color: var(--gray-400);
}

/* Footer */
.footer {
    padding: 60px 40px 40px;
    border-top: 1px solid var(--gray-100);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto 40px;
}

.footer-links {
    display: flex;
    gap: 32px;
}

.footer-links a {
    color: var(--gray-500);
    text-decoration: none;
    font-size: 14px;
}

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

.footer-bottom {
    text-align: center;
    font-size: 13px;
    color: var(--gray-400);
}

.footer-powered {
    text-align: center;
    font-size: 12px;
    color: var(--gray-400);
    margin-bottom: 20px;
}

.footer-powered a {
    color: var(--gray-500);
    text-decoration: none;
    transition: color 0.2s;
}

.footer-powered a:hover {
    color: var(--black);
}

.footer-author {
    color: var(--gray-500);
    text-decoration: none;
    transition: color 0.2s;
}

.footer-author:hover {
    color: var(--black);
}

/* Responsive */
@media (max-width: 768px) {
    .nav-pill {
        padding: 8px 8px 8px 12px;
        gap: 8px;
    }
    
    .logo span {
        display: none;
    }
    
    .nav-links {
        gap: 8px;
    }
    
    .nav-links a:not(.btn-download) {
        display: none;
    }
    
    .btn-download {
        padding: 8px 14px !important;
        font-size: 13px !important;
        white-space: nowrap;
    }
    
    .lang-switch {
        padding: 6px 10px;
        font-size: 12px;
    }
    
    .hero {
        padding: 100px 20px 40px;
    }
    
    .hero h1 {
        font-size: 42px;
    }
    
    .hero-desc {
        font-size: 16px;
    }
    
    .demo-wrapper {
        margin-top: 40px;
        padding: 20px;
        border-radius: 20px;
    }
    
    .feature-section {
        flex-direction: column;
        padding: 60px 24px;
        gap: 40px;
        margin: 20px;
        border-radius: 24px;
    }
    
    .feature-content h2 {
        font-size: 28px;
    }
    
    .light-blue {
        flex-direction: column-reverse;
    }
    
    .light-gray {
        flex-direction: column;
    }
    
    .speed-section {
        margin: 20px;
        border-radius: 24px;
        padding: 60px 24px;
    }
    
    .speed-comparison {
        flex-direction: column;
        gap: 30px;
    }
    
    .speed-vs {
        display: none;
    }
    
    .speed-item .speed-number {
        font-size: 56px;
    }
    
    .speed-item.highlight .speed-number {
        font-size: 72px;
    }
    
    .steps {
        flex-direction: column;
    }
    
    .step-arrow {
        transform: rotate(90deg);
    }
    
    .quote-mark {
        display: none;
    }
    
    .quote-section {
        padding: 80px 24px;
    }
    
    .quote-section h2 {
        font-size: 28px;
    }
    
    .filler-demo {
        max-width: 100%;
    }
    
    .filler-card {
        padding: 14px 16px;
    }
    
    .filler-text {
        font-size: 14px;
    }
    
    .hotwords-demo {
        width: 100%;
        max-width: 280px;
    }
    
    .hotword-item {
        padding: 12px 16px;
        font-size: 14px;
    }
    
    .platforms-section {
        margin: 20px;
        padding: 60px 20px 80px;
        border-radius: 24px;
    }
    
    .platforms-section h2 {
        font-size: 28px;
    }
    
    .platforms-section > p {
        font-size: 15px;
        margin-bottom: 40px;
    }
    
    .app-icon {
        width: 40px;
        height: 40px;
        border-radius: 10px;
    }
    
    .app-icons-row {
        gap: 8px;
    }
    
    .features-grid-section h2,
    .how-section h2 {
        font-size: 28px;
    }
    
    .cta-section h2 {
        font-size: 32px;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 20px;
    }
}