:root {
    --sage-50: oklch(97% 0.015 150);
    --sage-100: oklch(93% 0.025 150);
    --sage-200: oklch(87% 0.038 150);
    --sage-400: oklch(68% 0.08 155);
    --sage-600: oklch(50% 0.1 155);
    --sage-800: oklch(35% 0.075 155);
    --sage-900: oklch(22% 0.05 155);

    --amber-100: oklch(95% 0.04 75);
    --amber-300: oklch(85% 0.1 75);
    --amber-500: oklch(72% 0.15 72);
    --amber-700: oklch(55% 0.14 70);

    --stone-50: oklch(98% 0.005 90);
    --stone-100: oklch(96% 0.008 90);
    --stone-200: oklch(92% 0.012 90);
    --stone-400: oklch(72% 0.02 90);
    --stone-600: oklch(52% 0.018 90);
    --stone-800: oklch(30% 0.015 90);

    --bg: var(--stone-50);
    --surface: #fff;
    --surface-alt: var(--sage-50);
    --text-primary: var(--stone-800);
    --text-secondary: var(--stone-600);
    --text-muted: var(--stone-400);
    --accent: var(--sage-600);
    --accent-light: var(--sage-100);
    --accent-dark: var(--sage-800);
    --highlight: var(--amber-500);
    --highlight-bg: var(--amber-100);

    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 22px;
    --radius-xl: 32px;

    --font-display: 'Fraunces', Georgia, serif;
    --font-body: 'Plus Jakarta Sans', system-ui, sans-serif;

    --shadow-sm: 0 1px 3px oklch(0% 0 0 / 0.06), 0 1px 2px oklch(0% 0 0 / 0.04);
    --shadow-md: 0 4px 12px oklch(0% 0 0 / 0.08), 0 2px 4px oklch(0% 0 0 / 0.04);
    --shadow-lg: 0 12px 32px oklch(0% 0 0 / 0.1), 0 4px 8px oklch(0% 0 0 / 0.05);
    --shadow-glow: 0 0 32px oklch(50% 0.1 155 / 0.15);
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

body {
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg);
    overflow-x: hidden;
}

img,
svg {
    display: block;
    max-width: 100%;
}

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

/* ===== Typography ===== */
.display-xl {
    font-family: var(--font-display);
    font-size: clamp(2.6rem, 6vw, 5rem);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.02em;
    font-style: italic;
}

.display-lg {
    font-family: var(--font-display);
    font-size: clamp(1.8rem, 3.5vw, 2.8rem);
    font-weight: 500;
    line-height: 1.2;
    letter-spacing: -0.015em;
}

.display-md {
    font-family: var(--font-display);
    font-size: clamp(1.3rem, 2.5vw, 1.75rem);
    font-weight: 500;
    line-height: 1.3;
}

.body-lg {
    font-size: 1.125rem;
    line-height: 1.65;
}

.body-sm {
    font-size: 0.875rem;
    line-height: 1.55;
}

.label {
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--accent);
}

/* ===== Layout ===== */
.container {
    width: min(100%, 1200px);
    margin: 0 auto;
    padding: 0 clamp(1.25rem, 5vw, 3rem);
}

.section {
    padding: clamp(4rem, 10vw, 8rem) 0;
}

.section-narrow {
    padding: clamp(3rem, 7vw, 5.5rem) 0;
}

/* ===== Nav ===== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 1rem 0;
    transition: background 0.3s ease, box-shadow 0.3s ease, backdrop-filter 0.3s;
}

.nav.scrolled {
    background: oklch(98% 0.005 90 / 0.85);
    backdrop-filter: blur(16px) saturate(1.5);
    box-shadow: var(--shadow-sm), 0 1px 0 oklch(0% 0 0 / 0.06);
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-family: var(--font-display);
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--accent-dark);
    font-style: italic;
}

.nav-logo-mark {
    width: 32px;
    height: 32px;
    background: var(--accent);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    list-style: none;
}

.nav-links a {
    padding: 0.45rem 0.85rem;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: color 0.2s, background 0.2s;
}

.nav-links a:hover {
    color: var(--text-primary);
    background: var(--sage-100);
}

.nav-cta {
    display: flex;
    gap: 0.75rem;
    align-items: center;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.6rem 1.35rem;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s;
    border: none;
}

.btn:active {
    transform: scale(0.97);
}

.btn-primary {
    background: var(--accent);
    color: #fff;
    box-shadow: var(--shadow-sm), inset 0 1px 0 oklch(100% 0 0 / 0.08);
}

.btn-primary:hover {
    background: var(--accent-dark);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    border: 1.5px solid var(--stone-200);
}

.btn-ghost:hover {
    background: var(--surface);
    color: var(--text-primary);
    border-color: var(--stone-400);
}

.btn-lg {
    padding: 0.85rem 2rem;
    font-size: 1rem;
    border-radius: var(--radius-md);
}

.btn-xl {
    padding: 1rem 2.4rem;
    font-size: 1.05rem;
    border-radius: var(--radius-md);
}

/* ===== Hero ===== */
.hero {
    min-height: 100vh;
    min-height: 100svh;
    display: flex;
    align-items: center;
    padding-top: 5rem;
    padding-bottom: 3rem;
    position: relative;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 0;
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(oklch(50% 0.1 155 / 0.05) 1px, transparent 1px),
        linear-gradient(90deg, oklch(50% 0.1 155 / 0.05) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse 80% 70% at 50% 50%, #000 30%, transparent 80%);
}

.hero-orb-1 {
    position: absolute;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background: radial-gradient(circle, oklch(68% 0.08 155 / 0.18) 0%, transparent 70%);
    top: -10%;
    right: -8%;
    animation: float-orb 8s ease-in-out infinite;
}

.hero-orb-2 {
    position: absolute;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: radial-gradient(circle, oklch(85% 0.1 75 / 0.2) 0%, transparent 70%);
    bottom: 5%;
    left: -5%;
    animation: float-orb 10s ease-in-out infinite reverse;
}

@keyframes float-orb {

    0%,
    100% {
        transform: translate(0, 0) scale(1);
    }

    33% {
        transform: translate(20px, -30px) scale(1.05);
    }

    66% {
        transform: translate(-15px, 20px) scale(0.97);
    }
}

.hero-content {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: clamp(3rem, 6vw, 6rem);
    padding: clamp(2rem, 4vw, 4rem) 0;
}

/* grid 子项默认 min-width:auto 会撑破列宽，两列都需 min-width:0 才能真正等比 */
.hero-text,
.hero-visual {
    min-width: 0;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--sage-100);
    border: 1px solid var(--sage-200);
    border-radius: 100px;
    padding: 0.35rem 0.9rem 0.35rem 0.5rem;
    margin-bottom: 1.75rem;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent);
}

.hero-badge-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent);
    animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {

    0%,
    100% {
        opacity: 1;
        transform: scale(1);
    }

    50% {
        opacity: 0.5;
        transform: scale(0.7);
    }
}

.hero-headline {
    margin-bottom: 1.5rem;
    color: var(--sage-900);
}

.hero-headline em {
    color: var(--accent);
    font-style: italic;
}

.hero-sub {
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    max-width: 50ch;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    align-items: center;
    flex-wrap: wrap;
    margin-bottom: 3rem;
}

.hero-note {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.82rem;
    color: var(--text-muted);
}

.hero-note svg {
    color: var(--sage-400);
}

.hero-stats {
    display: flex;
    gap: 2.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--stone-200);
}

.hero-stat-num {
    font-family: var(--font-display);
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--sage-800);
    line-height: 1;
    margin-bottom: 0.25rem;
}

.hero-stat-label {
    font-size: 0.82rem;
    color: var(--text-muted);
    font-weight: 500;
}

.hero-visual {
    position: relative;
}

.hero-ppt-preview {
    background: var(--surface);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.ppt-bar {
    background: var(--stone-100);
    padding: 0.75rem 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    border-bottom: 1px solid var(--stone-200);
}

.ppt-title {
    margin-left: auto;
    margin-right: auto;
    font-size: 0.78rem;
    color: var(--stone-600);
    font-weight: 500;
}

.ppt-content {
    padding: 0;
    background: transparent;
}

.ppt-video {
    aspect-ratio: 16/9;
    position: relative;
    max-height: 60vh;
}

/* 兜底：浏览器不支持 aspect-ratio 时用经典 padding 撑出 16:9 */
@supports not (aspect-ratio: 16/9) {
    .ppt-video {
        height: 0;
        padding-top: 56.25%;
    }
}

.ppt-video iframe {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    border: 0;
}

.ppt-json-panel {
    margin-top: 1rem;
    background: var(--sage-900);
    padding: 10px;
    font-family: 'Courier New', monospace;
    font-size: 0.72rem;
    line-height: 1.7;
    color: var(--sage-200);
}

.ppt-json-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    padding-bottom: 0.6rem;
    margin-bottom: 0.6rem;
    border-bottom: 1px solid oklch(68% 0.08 155 / 0.2);
}

.ppt-json-file {
    font-size: 0.72rem;
    font-weight: 600;
    color: oklch(70% 0.04 155);
    letter-spacing: 0.02em;
}

.ppt-json-download {
    font-size: 0.68rem;
    font-weight: 700;
    color: var(--sage-900);
    background: var(--sage-400);
    border-radius: 6px;
    padding: 0.25rem 0.6rem;
    transition: background 0.2s, transform 0.15s;
    white-space: nowrap;
}

.ppt-json-download:hover {
    background: oklch(75% 0.1 155);
    transform: translateY(-1px);
}

.ppt-json-code {
    margin: 0;
    max-height: 220px;
    overflow: auto;
    white-space: pre;
    scrollbar-width: thin;
    scrollbar-color: oklch(68% 0.08 155 / 0.5) transparent;
}

.ppt-json-code::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

.ppt-json-code::-webkit-scrollbar-track {
    background: transparent;
}

.ppt-json-code::-webkit-scrollbar-thumb {
    background: oklch(68% 0.08 155 / 0.45);
    border-radius: 8px;
}

.ppt-json-code::-webkit-scrollbar-thumb:hover {
    background: oklch(72% 0.1 155 / 0.65);
}

.ppt-json-code code {
    font-family: inherit;
    font-size: inherit;
    color: inherit;
}

.json-key {
    color: oklch(80% 0.1 200);
}

.json-str {
    color: oklch(85% 0.1 75);
}

.json-num {
    color: oklch(80% 0.08 330);
}

/* ===== Features: Three Pillars ===== */
.features-intro {
    text-align: center;
    max-width: 65ch;
    margin: 0 auto;
    margin-bottom: clamp(3rem, 6vw, 5rem);
}

.features-intro .label {
    margin-bottom: 1rem;
}

.features-intro .display-lg {
    margin-bottom: 1rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.feature-card {
    background: linear-gradient(135deg, var(--sage-50) 0%, transparent 60%);
    border: 1px solid var(--stone-200);
    border-radius: var(--radius-xl);
    padding: clamp(1.5rem, 3vw, 2.5rem);
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    /* transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s; */
    position: relative;
    overflow: hidden;
}

.feature-card:hover {
    transform: scale(1.05) !important;
    box-shadow: var(--shadow-lg);
    border-color: var(--sage-200);
    color: var(--stone-900);
    /* 或更黑的颜色 */
}

.feature-card:hover h3,
.feature-card:hover .feature-title {
    font-weight: 700;
    color: var(--stone-900);
}

.feature-card::before {
    content: '';
    position: absolute;
    inset: 0;
    opacity: 0;
    /* transition: opacity 0.3s; */
    pointer-events: none;
}

.feature-card:hover::before {
    opacity: 1;
}

.feature-icon {
    width: 52px;
    height: 52px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    flex-shrink: 0;
}

.feature-icon-green {
    background: var(--sage-100);
}

.feature-icon-amber {
    background: var(--amber-100);
}

.feature-icon-blue {
    background: oklch(94% 0.03 240);
}

.feature-num {
    position: absolute;
    top: 1.5rem;
    right: 1.75rem;
    font-family: var(--font-display);
    font-size: 4rem;
    font-weight: 700;
    color: var(--stone-200);
    line-height: 1;
    pointer-events: none;
    user-select: none;
}

.feature-body h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.6rem;
    line-height: 1.3;
}

.feature-body p {
    color: var(--text-secondary);
    font-size: 0.93rem;
    line-height: 1.65;
}

.feature-tags {
    display: flex;
    gap: 0.4rem;
    flex-wrap: wrap;
    margin-top: auto;
    padding-top: 1rem;
}

.tag {
    font-size: 0.72rem;
    font-weight: 600;
    padding: 0.25rem 0.65rem;
    border-radius: 100px;
    border: 1px solid var(--stone-200);
    color: var(--text-secondary);
    background: var(--bg);
}

/* ===== GGB Spotlight ===== */
.ggb-section {
    background: var(--sage-900);
    color: #fff;
    overflow: hidden;
    position: relative;
}

.ggb-section .container {
    position: relative;
    z-index: 1;
}

.ggb-bg-pattern {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(oklch(68% 0.08 155 / 0.08) 1px, transparent 1px),
        linear-gradient(90deg, oklch(68% 0.08 155 / 0.08) 1px, transparent 1px);
    background-size: 40px 40px;
}

.ggb-inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: clamp(3rem, 6vw, 6rem);
    align-items: center;
}

.ggb-text .label {
    color: var(--sage-400);
    margin-bottom: 1.25rem;
}

.ggb-text .display-lg {
    color: #fff;
    margin-bottom: 1.25rem;
}

.ggb-text p {
    color: oklch(80% 0.02 155);
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.ggb-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.9rem;
    margin-bottom: 2.5rem;
}

.ggb-list li {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    font-size: 0.93rem;
    color: oklch(85% 0.025 155);
    line-height: 1.55;
}

.ggb-check {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--sage-400);
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 0.1em;
}

.ggb-demo {
    background: var(--sage-800);
    border-radius: var(--radius-xl);
    border: 1px solid oklch(68% 0.08 155 / 0.3);
    overflow: hidden;
}

.ggb-demo-bar {
    background: oklch(25% 0.05 155);
    padding: 0.85rem 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.85rem;
    border-bottom: 1px solid oklch(68% 0.08 155 / 0.2);
}

.ggb-demo-dots {
    display: flex;
    gap: 6px;
}

.ggb-demo-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: oklch(68% 0.08 155 / 0.4);
}

.ggb-demo-title {
    font-size: 0.78rem;
    color: oklch(60% 0.04 155);
    font-weight: 500;
    margin: 0 auto;
}

.ggb-demo-body {
    padding: 1.5rem;
    aspect-ratio: 4/3;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ggb-canvas {
    width: 100%;
    height: 100%;
    position: relative;
}

/* Animated geometry illustration */
.ggb-canvas svg {
    width: 100%;
    height: 100%;
}

.ggb-interactive-tag {
    position: absolute;
    bottom: 2rem;
    right: 2rem;
    background: var(--sage-400);
    color: var(--sage-900);
    font-size: 0.72rem;
    font-weight: 700;
    padding: 0.3rem 0.75rem;
    border-radius: 100px;
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.interactive-pulse {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--sage-900);
    animation: pulse-dot 1.5s ease-in-out infinite;
}

/* ===== Plugin System ===== */
.plugin-section {
    background: var(--surface-alt);
}

.plugin-inner {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: clamp(3rem, 6vw, 6rem);
    align-items: center;
}

.plugin-text .label {
    margin-bottom: 1.25rem;
}

.plugin-text .display-lg {
    margin-bottom: 1.25rem;
    color: var(--sage-900);
}

.plugin-text p {
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.7;
}

.plugin-showcase {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.85rem;
}

.plugin-card {
    background: var(--surface);
    border: 1px solid var(--stone-200);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    transition: transform 0.2s ease, box-shadow 0.2s;
    cursor: pointer;
    color: inherit;
    text-decoration: none;
}

a.plugin-card {
    display: block;
}

a.plugin-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.plugin-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.plugin-card-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    margin-bottom: 0.75rem;
}

.plugin-card h4 {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.3rem;
}

.plugin-card p {
    font-size: 0.78rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.plugin-card-featured {
    grid-column: span 2;
    background: linear-gradient(135deg, var(--sage-900) 0%, var(--sage-800) 100%);
    border-color: var(--sage-700, oklch(40% 0.07 155));
    color: #fff;
}

.plugin-card-featured h4 {
    color: #fff;
}

.plugin-card-featured p {
    color: oklch(75% 0.04 155);
}

/* ===== Pricing ===== */

.pricing-intro {
    text-align: center;
    margin-bottom: clamp(3rem, 6vw, 5rem);
}

.pricing-intro .label {
    margin-bottom: 1rem;
}

.pricing-grid {
    display: grid;
    grid-template-columns: 1fr 1.1fr;
    gap: 1.5rem;
    max-width: 900px;
    margin: 0 auto;
}

.pricing-card {
    background: var(--surface);
    border: 1px solid var(--stone-200);
    border-radius: var(--radius-xl);
    padding: clamp(2rem, 3.5vw, 3rem);
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.pricing-card-pro {
    background: linear-gradient(160deg, var(--sage-900) 0%, oklch(28% 0.06 160) 100%);
    border-color: var(--sage-700, oklch(40% 0.07 155));
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.pricing-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    background: var(--amber-100);
    color: var(--amber-700);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    padding: 0.3rem 0.75rem;
    border-radius: 100px;
    width: fit-content;
}

.pricing-card-pro .pricing-badge {
    background: oklch(70% 0.12 75 / 0.2);
    color: oklch(85% 0.1 75);
}

.pricing-name {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.pricing-card-pro .pricing-name {
    color: #fff;
}

.pricing-price {
    display: flex;
    align-items: baseline;
    gap: 0.25rem;
}

.price-amount {
    font-family: var(--font-display);
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1;
    color: var(--sage-900);
}

.pricing-card-pro .price-amount {
    color: #fff;
}

.price-period {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.pricing-card-pro .price-period {
    color: oklch(65% 0.04 155);
}

.pricing-desc {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.pricing-card-pro .pricing-desc {
    color: oklch(72% 0.04 155);
}

.pricing-divider {
    height: 1px;
    background: var(--stone-200);
}

.pricing-card-pro .pricing-divider {
    background: oklch(60% 0.06 155 / 0.25);
}

.pricing-features {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    flex: 1;
}

.pricing-features li {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    font-size: 0.88rem;
    color: var(--text-secondary);
}

.pricing-card-pro .pricing-features li {
    color: oklch(80% 0.03 155);
}

.pf-icon {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 0.65rem;
}

.pf-check {
    background: var(--sage-100);
    color: var(--accent);
}

.pf-check-pro {
    background: oklch(55% 0.09 155 / 0.3);
    color: var(--sage-400);
}

/* ===== CTA Banner ===== */
.cta-section {
    background: var(--surface-alt);
}

.cta-banner {
    background: linear-gradient(135deg, var(--sage-900) 0%, oklch(28% 0.055 165) 100%);
    border-radius: var(--radius-xl);
    padding: clamp(3rem, 6vw, 5rem) clamp(2rem, 5vw, 5rem);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-banner-bg {
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(ellipse 60% 80% at 20% 50%, oklch(68% 0.08 155 / 0.12) 0%, transparent 60%),
        radial-gradient(ellipse 50% 60% at 80% 50%, oklch(72% 0.12 75 / 0.1) 0%, transparent 60%);
}

.cta-inner {
    position: relative;
    z-index: 1;
}

.cta-inner .display-lg {
    color: #fff;
    margin-bottom: 1rem;
}

.cta-inner p {
    color: oklch(75% 0.03 155);
    margin-bottom: 2.5rem;
    font-size: 1.05rem;
}

.cta-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-white {
    background: #fff;
    color: var(--sage-900);
    font-weight: 700;
}

.btn-white:hover {
    background: var(--sage-50);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.btn-outline-white {
    background: transparent;
    color: oklch(85% 0.04 155);
    border: 1.5px solid oklch(55% 0.08 155 / 0.5);
}

.btn-outline-white:hover {
    background: oklch(100% 0 0 / 0.06);
    border-color: oklch(68% 0.08 155 / 0.6);
}

/* ===== Footer ===== */
.footer {
    background: var(--sage-900);
    color: oklch(70% 0.03 155);
    padding: clamp(3rem, 6vw, 5rem) 0 1.5rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 1fr 0.8fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    color: #fff;
    font-style: italic;
    margin-bottom: 1rem;
}

.footer-logo-mark {
    width: 28px;
    height: 28px;
    background: var(--sage-400);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.footer-tagline {
    font-size: 0.85rem;
    line-height: 1.65;
    margin-bottom: 1.5rem;
    max-width: 28ch;
}

.footer-col h5 {
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: oklch(55% 0.05 155);
    margin-bottom: 1.25rem;
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
}

.footer-links a {
    font-size: 0.88rem;
    color: oklch(65% 0.03 155);
    transition: color 0.15s;
}

.footer-links a:hover {
    color: var(--sage-200);
}

.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.5rem 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid oklch(40% 0.05 155 / 0.4);
    font-size: 0.8rem;
    color: oklch(45% 0.03 155);
}

.footer-beian {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.footer-beian a {
    color: inherit;
    text-decoration: none;
}

.footer-beian a:hover {
    color: var(--sage-200);
}

/* ===== Scroll Animations ===== */
/* 仅在 JS 可用时隐藏，避免 JS 失败导致整页内容不可见 */
.js .reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

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

.reveal-delay-1 {
    transition-delay: 0.1s;
}

.reveal-delay-2 {
    transition-delay: 0.2s;
}

.reveal-delay-3 {
    transition-delay: 0.3s;
}

/* ===== Mobile Hamburger ===== */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    width: 28px;
    cursor: pointer;
    padding: 4px;
    background: none;
    border: none;
}

.nav-toggle span {
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: transform 0.25s, opacity 0.25s;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr 1fr;
        gap: 2.5rem;
    }
}

@media (max-width: 768px) {

    .nav-links,
    .nav-cta {
        display: none;
    }

    .nav-toggle {
        display: flex;
    }

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

    .hero-visual {
        display: none;
    }

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

    .ggb-inner {
        grid-template-columns: 1fr;
    }

    .plugin-inner {
        grid-template-columns: 1fr;
    }

    .pricing-grid {
        grid-template-columns: 1fr;
        max-width: 480px;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 0.5rem;
        text-align: center;
    }
}