/* 纸飞机介绍页 — 品牌色取自 logo.ico：#00b0f0 / #f06000 */

:root {
    color-scheme: dark;
  /* 品牌色（logo 提取） */
    --brand-blue: #00b0f0;
    --brand-blue-hover: #0099d6;
    --brand-blue-soft: #e6f7fd;
    --brand-orange: #f06000;
    --brand-orange-hover: #d95400;
    --brand-orange-soft: #fff3e8;
  /* 多彩图标 */
    --icon-plot: #00b0f0;
    --icon-hex: #0088cc;
    --icon-filter: #f06000;
    --icon-split: #10b981;
    --icon-highlight: #eab308;
    --icon-layout: #ec4899;
    --icon-comm: #0ea5e9;
    --icon-image: #f06000;
    --icon-autoreply: #f97316;
    --icon-mcp: #00b0f0;
    --icon-cmdgroup: #14b8a6;
    --icon-lua: #3b82f6;
    --icon-record: #ef4444;
    --icon-toolbox: #06b6d4;
    --icon-export: #22c55e;
    --radius: 12px;
    --radius-lg: 16px;
    --space-xs: 0.5rem;
    --space-sm: 0.75rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4.5rem;
    --font-body: "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    --font-display: "Outfit", "Noto Sans SC", sans-serif;
    --motion-ease: cubic-bezier(0.22, 1, 0.36, 1);
    --transition: 200ms ease;
    --header-h: 56px;
    --mobile-nav-h: 44px;
  /* 暗色为默认主题 */
    --color-bg: #0a1018;
    --color-surface: #141c28;
    --color-surface-2: #1c2838;
    --color-text: #f1f5f9;
    --color-text-muted: #94a3b8;
    --color-primary: #ff7a1a;
    --color-primary-hover: #ff9538;
    --color-primary-text: #1a0a00;
    --color-accent: var(--brand-blue);
    --color-border: #2a3a4d;
    --color-hero-bg: #000000;
    --color-hero-text: #f1f5f9;
    --color-hero-muted: #8b9cb0;
    --color-hero-accent: #ff7a1a;
    --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.4);
    --shadow-header: 0 1px 0 rgba(255, 255, 255, 0.06);
    --focus-ring: 0 0 0 3px rgba(255, 122, 26, 0.45);
  /* 液态玻璃导航 */
    --glass-fill: linear-gradient(
        165deg,
        color-mix(in srgb, var(--color-surface) 14%, transparent) 0%,
        color-mix(in srgb, var(--color-surface) 8%, transparent) 55%,
        color-mix(in srgb, #000000 2%, transparent) 100%
    );
    --glass-edge: color-mix(in srgb, #ffffff 7%, transparent);
    --glass-backdrop: blur(3px) saturate(1.15);
    --glass-inset: inset 0 1px 0 color-mix(in srgb, #ffffff 8%, transparent);
    --glass-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}

/* 亮色主题 */
:root[data-theme="light"] {
    color-scheme: light;
    --color-bg: #f7f8fa;
    --color-surface: #ffffff;
    --color-surface-2: #f1f3f6;
    --color-text: #0f172a;
    --color-text-muted: #475569;
    --color-primary: var(--brand-orange);
    --color-primary-hover: var(--brand-orange-hover);
    --color-primary-text: #ffffff;
    --color-accent: var(--brand-blue);
    --color-border: #e2e6ec;
    --color-hero-bg: #f7f8fa;
    --color-hero-text: #0f172a;
    --color-hero-muted: #475569;
    --color-hero-accent: var(--brand-orange);
    --shadow-card: 0 1px 3px rgba(15, 23, 42, 0.06), 0 8px 24px rgba(15, 23, 42, 0.08);
    --shadow-header: 0 1px 0 rgba(15, 23, 42, 0.08);
    --focus-ring: 0 0 0 3px rgba(240, 96, 0, 0.42);
    --glass-fill: linear-gradient(
        165deg,
        color-mix(in srgb, #ffffff 18%, transparent) 0%,
        color-mix(in srgb, #ffffff 10%, transparent) 55%,
        color-mix(in srgb, var(--color-surface) 6%, transparent) 100%
    );
    --glass-edge: color-mix(in srgb, #ffffff 16%, transparent);
    --glass-backdrop: blur(3px) saturate(1.1);
    --glass-inset: inset 0 1px 0 color-mix(in srgb, #ffffff 22%, transparent);
    --glass-shadow: 0 4px 16px rgba(15, 23, 42, 0.04);
}

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

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
    scrollbar-gutter: stable;
    overflow-x: clip;
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
}

body {
    margin: 0;
    min-height: 100dvh;
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-bg);
    padding-bottom: env(safe-area-inset-bottom);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: var(--color-primary);
    text-decoration-thickness: 1px;
    text-underline-offset: 2px;
}

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

:focus {
    outline: none;
}

:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
    box-shadow: var(--focus-ring);
}

.skip-link {
    position: absolute;
    left: -9999px;
    top: var(--space-sm);
    z-index: 1000;
    padding: var(--space-sm) var(--space-md);
    background: var(--color-primary);
    color: var(--color-primary-text);
    border-radius: var(--radius);
    font-weight: 600;
    text-decoration: none;
}

.skip-link:focus {
    left: var(--space-md);
}

/* Header */

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--glass-fill);
    backdrop-filter: var(--glass-backdrop);
    -webkit-backdrop-filter: var(--glass-backdrop);
    border-bottom: 1px solid var(--glass-edge);
    box-shadow: var(--glass-inset), var(--glass-shadow);
    padding: 0 env(safe-area-inset-right) 0 env(safe-area-inset-left);
}

.site-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-sm);
    max-width: 1280px;
    height: var(--header-h);
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.brand {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    min-width: 0;
    flex: 1;
    color: var(--color-text);
    text-decoration: none;
    font-weight: 600;
}

.brand:hover {
    color: var(--color-text);
}

.brand__logo {
    flex-shrink: 0;
    border-radius: 8px;
    object-fit: contain;
}

.brand__name {
    font-family: var(--font-display);
    font-size: 0.9375rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.site-header__actions {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    flex-shrink: 0;
    --header-control-h: 40px;
}

.site-header__actions .theme-toggle {
    width: var(--header-control-h);
    height: var(--header-control-h);
    border-radius: var(--radius);
}

.site-header__actions .btn--sm {
    height: var(--header-control-h);
    min-height: var(--header-control-h);
    line-height: 1;
}

.site-nav {
    display: none;
    align-items: center;
    gap: var(--space-lg);
}

.site-nav__link {
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: 0.9375rem;
    font-weight: 500;
    padding: var(--space-xs) 0;
    border-bottom: 2px solid transparent;
    transition: color var(--transition), border-color var(--transition);
}

.site-nav__link:hover,
.site-nav__link.is-active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
}

.theme-toggle {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    padding: 0;
    border: 1px solid var(--color-border);
    border-radius: 10px;
    background: var(--color-surface-2);
    color: var(--color-text);
    cursor: pointer;
    touch-action: manipulation;
    transition: background var(--transition), border-color var(--transition), transform 180ms var(--motion-ease);
}

.theme-toggle:hover {
    background: var(--color-surface);
    border-color: var(--color-primary);
}

.theme-toggle:active {
    transform: scale(0.96);
}

.theme-toggle svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

/* 暗色 → 显示太阳（点击切亮色）；亮色 → 显示月亮（点击切暗色） */
.theme-toggle .icon-sun {
    display: none;
}

.theme-toggle .icon-moon {
    display: block;
}

.theme-toggle.is-dark .icon-sun {
    display: block;
}

.theme-toggle.is-dark .icon-moon {
    display: none;
}

/* 手机端快捷导航 */
.mobile-nav {
    display: flex;
    position: sticky;
    top: var(--header-h);
    z-index: 90;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: var(--glass-fill);
    backdrop-filter: var(--glass-backdrop);
    -webkit-backdrop-filter: var(--glass-backdrop);
    border-bottom: 1px solid var(--glass-edge);
    box-shadow: var(--glass-inset), var(--glass-shadow);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}

.mobile-nav::-webkit-scrollbar {
    display: none;
}

.mobile-nav__link {
    flex: 1;
    min-width: max-content;
    min-height: var(--mobile-nav-h);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0 var(--space-md);
    border-radius: 999px;
    font-size: 0.875rem;
    font-weight: 600;
    text-decoration: none;
    color: var(--color-text-muted);
    background: var(--color-surface-2);
    border: 1px solid var(--color-border);
    white-space: nowrap;
    transition: color var(--transition), background var(--transition), border-color var(--transition);
}

.mobile-nav__link:hover,
.mobile-nav__link.is-active {
    color: var(--color-primary-text);
    background: var(--color-primary);
    border-color: var(--color-primary);
}

@media (prefers-reduced-transparency: reduce) {
    .site-header,
    .mobile-nav {
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
        background: var(--color-surface);
        border-bottom-color: var(--color-border);
        box-shadow: var(--shadow-header);
    }
}

@media (min-width: 768px) {
    .site-header {
        --header-h: 64px;
    }

    .site-nav {
        display: flex;
    }

    .brand__name {
        font-size: 1.0625rem;
    }

    .brand {
        flex: 0 1 auto;
    }

    .mobile-nav {
        display: none;
    }
}

@media (min-width: 480px) {
    .site-header__cta .btn__text-short {
        display: none;
    }
}

@media (max-width: 479px) {
    .site-header__cta .btn__text-full {
        display: none;
    }
}

/* Buttons */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 0 var(--space-lg);
    border-radius: var(--radius);
    font-family: inherit;
    font-size: 0.9375rem;
    font-weight: 600;
    line-height: 1.2;
    text-decoration: none;
    border: 1px solid transparent;
    cursor: pointer;
    touch-action: manipulation;
    transition:
        background var(--transition),
        color var(--transition),
        border-color var(--transition),
        transform 220ms var(--motion-ease),
        box-shadow 220ms var(--motion-ease);
}

.btn:active {
    transform: scale(0.98);
}

.btn--sm {
    min-height: 40px;
    padding: 0 var(--space-md);
    font-size: 0.8125rem;
}

.btn--lg {
    min-height: 48px;
    padding: 0 var(--space-xl);
    font-size: 1rem;
}

.btn--primary {
    background: var(--color-primary);
    color: var(--color-primary-text);
    border-color: var(--color-primary);
}

.btn--primary:hover {
    background: var(--color-primary-hover);
    border-color: var(--color-primary-hover);
    color: var(--color-primary-text);
    box-shadow: 0 4px 14px color-mix(in srgb, var(--color-primary) 40%, transparent);
}

.btn--ghost {
    background: transparent;
    color: var(--color-hero-text);
    border-color: color-mix(in srgb, var(--color-hero-text) 30%, transparent);
}

.btn--ghost:hover {
    background: color-mix(in srgb, var(--color-hero-text) 8%, transparent);
    color: var(--color-hero-text);
    border-color: color-mix(in srgb, var(--color-hero-text) 50%, transparent);
}

.btn--outline {
    background: transparent;
    color: var(--color-text);
    border-color: var(--color-border);
}

.btn--outline:hover {
    background: color-mix(in srgb, var(--color-primary) 10%, transparent);
    color: var(--color-primary);
    border-color: var(--color-primary);
}

/* Hero */

.hero {
    position: relative;
    overflow: visible;
}

.hero__banner {
    position: relative;
    background: var(--color-hero-bg);
    color: var(--color-hero-text);
    padding: var(--space-2xl) var(--space-md) var(--space-md);
}

.hero__banner--foot {
    padding-top: var(--space-lg);
    padding-bottom: var(--space-xl);
}

@media (min-width: 768px) {
    .hero__banner {
        padding: var(--space-3xl) var(--space-md) var(--space-lg);
    }

    .hero__banner--foot {
        padding-bottom: var(--space-2xl);
    }
}

.hero__showcase {
    --hero-showcase-w: 960px;
    width: 100%;
    box-sizing: border-box;
    background: var(--color-bg);
    overflow: visible;
    padding-block: var(--space-lg) var(--space-xl);
    /* 相对视口左右对称留白，保证 960px 容器始终落在窗口正中 */
    padding-inline: max(var(--space-md), calc((100% - var(--hero-showcase-w)) / 2));
}

.hero-showcase__frame {
    width: 100%;
    max-width: var(--hero-showcase-w);
    margin: 0;
    border-color: color-mix(in srgb, var(--brand-orange) 22%, var(--color-border));
}

.hero-showcase__frame img {
    width: 100%;
    height: 100%;
    max-width: none;
    object-fit: fill;
    object-position: center;
    background: var(--color-surface);
}

.hero__grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(color-mix(in srgb, var(--brand-orange) 10%, transparent) 1px, transparent 1px),
        linear-gradient(90deg, color-mix(in srgb, var(--brand-orange) 10%, transparent) 1px, transparent 1px);
    background-size: 40px 40px;
    mask-image: radial-gradient(ellipse 85% 75% at 50% 35%, black 15%, transparent 78%);
    pointer-events: none;
}

.hero__grid::after {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 55% 45% at 75% 15%, color-mix(in srgb, var(--brand-orange) 28%, transparent), transparent 60%),
        radial-gradient(ellipse 40% 35% at 20% 80%, color-mix(in srgb, var(--brand-blue) 14%, transparent), transparent 55%);
}

.hero__inner {
    position: relative;
    max-width: 720px;
    margin: 0 auto;
    text-align: center;
}

.hero__eyebrow {
    margin: 0 0 var(--space-md);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-hero-accent);
}

@media (min-width: 768px) {
    .hero__eyebrow {
        font-size: 0.8125rem;
        letter-spacing: 0.12em;
    }
}

.hero__title {
    margin: 0 0 var(--space-lg);
    font-family: var(--font-display);
    font-size: clamp(1.5rem, 6vw, 2.75rem);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.03em;
}

.hero__lead {
    margin: 0 0 var(--space-xl);
    font-size: clamp(0.9375rem, 2.8vw, 1.125rem);
    line-height: 1.7;
    color: var(--color-hero-muted);
    max-width: 36em;
    margin-left: auto;
    margin-right: auto;
}

.hero__actions {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    align-items: stretch;
}

@media (min-width: 480px) {
    .hero__actions {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
        align-items: center;
    }

    .hero__actions .btn {
        width: auto;
    }
}

.hero__actions .btn {
    width: 100%;
}

/* Sections */

.section {
    padding: var(--space-2xl) var(--space-md);
    background: var(--color-bg);
}

@media (min-width: 768px) {
    .section {
        padding: var(--space-3xl) var(--space-md);
    }
}

.section__inner {
    max-width: 1280px;
    margin: 0 auto;
}

.section__header {
    text-align: center;
    margin-bottom: var(--space-xl);
}

@media (min-width: 768px) {
    .section__header {
        margin-bottom: var(--space-2xl);
    }
}

.section__title {
    margin: 0 0 var(--space-sm);
    font-family: var(--font-display);
    font-size: clamp(1.375rem, 4vw, 2rem);
    font-weight: 700;
    letter-spacing: -0.02em;
}

.section__lead {
    margin: 0;
    color: var(--color-text-muted);
    font-size: clamp(0.9375rem, 2.5vw, 1.0625rem);
    max-width: 36em;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
}

/* Feature grid */

.feature-grid {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: var(--space-md);
    grid-template-columns: 1fr;
}

@media (min-width: 640px) {
    .feature-grid {
        gap: var(--space-lg);
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .feature-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.feature-card {
    border-radius: var(--radius-lg);
    transition: transform 220ms var(--motion-ease), box-shadow 220ms var(--motion-ease);
}

.feature-card__link {
    display: flex;
    flex-direction: column;
    height: 100%;
    padding: var(--space-lg);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    color: inherit;
    text-decoration: none;
    cursor: pointer;
    touch-action: manipulation;
    transition:
        transform 220ms var(--motion-ease),
        box-shadow 220ms var(--motion-ease),
        border-color 220ms var(--motion-ease);
}

@media (min-width: 768px) {
    .feature-card__link {
        padding: var(--space-xl) var(--space-lg);
    }
}

.feature-card__link:hover {
    transform: translateY(-3px);
    border-color: color-mix(in srgb, var(--brand-orange) 35%, var(--color-border));
    box-shadow: 0 12px 32px color-mix(in srgb, var(--brand-orange) 16%, transparent);
}

.feature-card__link:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 3px;
}

.feature-card__more {
    margin-top: auto;
    padding-top: var(--space-md);
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-primary);
}

.feature-card__link:hover .feature-card__more {
    color: var(--color-primary-hover);
}

.feature-card__icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    margin-bottom: var(--space-md);
    border-radius: 12px;
    color: #ffffff;
}

.feature-card__icon svg {
    width: 24px;
    height: 24px;
}

.feature-card__icon--plot {
    background: linear-gradient(135deg, var(--icon-plot), #33c9ff);
}

.feature-card__icon--hex {
    background: linear-gradient(135deg, var(--icon-hex), #00ccff);
}

.feature-card__icon--filter {
    background: linear-gradient(135deg, var(--icon-filter), #ff8c33);
}

.feature-card__icon--split {
    background: linear-gradient(135deg, var(--icon-split), #34d399);
}

.feature-card__icon--highlight {
    background: linear-gradient(135deg, var(--icon-highlight), #facc15);
}

.feature-card__icon--layout {
    background: linear-gradient(135deg, var(--icon-layout), #f472b6);
}

.feature-card__icon--comm {
    background: linear-gradient(135deg, var(--icon-comm), #38bdf8);
}

.feature-card__icon--image {
    background: linear-gradient(135deg, var(--icon-image), #ff8800);
}

.feature-card__icon--autoreply {
    background: linear-gradient(135deg, var(--icon-autoreply), #fb923c);
}

.feature-card__icon--mcp {
    background: linear-gradient(135deg, var(--icon-mcp), #f06000);
}

.feature-card__icon--cmdgroup {
    background: linear-gradient(135deg, var(--icon-cmdgroup), #2dd4bf);
}

.feature-card__icon--lua {
    background: linear-gradient(135deg, var(--icon-lua), #60a5fa);
}

.feature-card__icon--record {
    background: linear-gradient(135deg, var(--icon-record), #f87171);
}

.feature-card__icon--toolbox {
    background: linear-gradient(135deg, var(--icon-toolbox), #22d3ee);
}

.feature-card__icon--export {
    background: linear-gradient(135deg, var(--icon-export), #4ade80);
}

.feature-card__title {
    margin: 0 0 var(--space-xs);
    font-size: 1.0625rem;
    font-weight: 700;
}

.feature-card__desc {
    margin: 0;
    font-size: 0.9375rem;
    color: var(--color-text-muted);
    line-height: 1.55;
}

/* Feature modules */

.section--features .section__inner {
    display: flex;
    flex-direction: column;
    gap: var(--space-2xl);
}

@media (min-width: 768px) {
    .section--features .section__inner {
        gap: var(--space-3xl);
    }
}

.feature-module {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
    scroll-margin-top: calc(var(--header-h) + var(--mobile-nav-h) + 12px);
}

@media (min-width: 768px) {
    .feature-module {
        scroll-margin-top: calc(var(--header-h) + 16px);
    }
}

.feature-module__media,
.feature-module__body {
    width: 100%;
}

.feature-module__media {
    overflow: visible;
    padding: var(--space-sm);
}

.feature-module__body {
    text-align: left;
}

.feature-module__title {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin: 0 0 var(--space-md);
    font-family: var(--font-display);
    font-size: clamp(1.25rem, 4vw, 1.75rem);
    font-weight: 700;
    letter-spacing: -0.02em;
}

.feature-module__title::before {
    content: "";
    flex-shrink: 0;
    width: 4px;
    height: 1.1em;
    border-radius: 2px;
    background: var(--module-accent, var(--color-primary));
}

.feature-module--plot { --module-accent: var(--icon-plot); }
.feature-module--hex { --module-accent: var(--icon-hex); }
.feature-module--filter { --module-accent: var(--icon-filter); }
.feature-module--split { --module-accent: var(--icon-split); }
.feature-module--highlight { --module-accent: var(--icon-highlight); }
.feature-module--layout { --module-accent: var(--icon-layout); }
.feature-module--comm { --module-accent: var(--icon-comm); }
.feature-module--image { --module-accent: var(--icon-image); }
.feature-module--autoreply { --module-accent: var(--icon-autoreply); }
.feature-module--mcp { --module-accent: var(--icon-mcp); }
.feature-module--cmdgroup { --module-accent: var(--icon-cmdgroup); }
.feature-module--lua { --module-accent: var(--icon-lua); }
.feature-module--record { --module-accent: var(--icon-record); }
.feature-module--toolbox { --module-accent: var(--icon-toolbox); }
.feature-module--export { --module-accent: var(--icon-export); }

.feature-module__desc {
    margin: 0 0 var(--space-lg);
    color: var(--color-text-muted);
    font-size: 0.9375rem;
    line-height: 1.7;
}

@media (min-width: 768px) {
    .feature-module__desc {
        font-size: 1rem;
    }
}

.feature-module__list {
    margin: 0;
    padding-left: 1.125rem;
    color: var(--color-text);
    font-size: 0.9375rem;
}

.feature-module__list li {
    margin-bottom: var(--space-sm);
    line-height: 1.55;
}

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

.feature-module__list code {
    font-size: 0.85em;
    padding: 0.12em 0.4em;
    border-radius: 4px;
    background: var(--color-surface-2);
    border: 1px solid var(--color-border);
    word-break: break-all;
}

@media (min-width: 1024px) {
    .feature-module {
        flex-direction: row;
        gap: var(--space-2xl);
        align-items: center;
    }

    .feature-module--reverse {
        flex-direction: row-reverse;
    }

    .feature-module__media,
    .feature-module__body {
        flex: 1;
        width: auto;
    }
}

/* Screenshot frame */

.screenshot-frame {
    margin: 0;
    aspect-ratio: 16 / 10;
    border-radius: var(--radius-lg);
    overflow: visible;
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-card);
    background: var(--color-surface-2);
    position: relative;
    transform-origin: center center;
    transition:
        transform 280ms var(--motion-ease),
        box-shadow 280ms var(--motion-ease),
        border-color 280ms var(--motion-ease);
    will-change: transform;
}

.screenshot-frame img {
    display: block;
    width: 100%;
    height: 100%;
    border-radius: calc(var(--radius-lg) - 1px);
    object-fit: fill;
    object-position: center;
}

.screenshot-frame.is-placeholder {
    overflow: hidden;
}

@media (hover: hover) and (pointer: fine) {
    .screenshot-frame:not(.is-placeholder):hover {
        transform: translateY(-6px) scale(1.02);
        border-color: color-mix(in srgb, var(--brand-orange) 45%, var(--color-border));
        box-shadow:
            0 20px 48px color-mix(in srgb, var(--brand-orange) 18%, transparent),
            0 8px 20px rgba(0, 0, 0, 0.12);
    }
}

.screenshot-frame.is-placeholder::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(
        135deg,
        color-mix(in srgb, var(--color-primary) 10%, var(--color-surface-2)),
        var(--color-surface)
    );
}

.screenshot-frame.is-placeholder::after {
    content: attr(data-placeholder);
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-lg);
    text-align: center;
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    line-height: 1.5;
}

.screenshot-frame.is-placeholder img {
    opacity: 0;
    position: absolute;
}

/* CTA */

.cta {
    padding: var(--space-2xl) var(--space-md);
    background: linear-gradient(
        180deg,
        var(--color-bg) 0%,
        color-mix(in srgb, var(--brand-orange) 10%, var(--color-bg)) 100%
    );
}

@media (min-width: 768px) {
    .cta {
        padding: var(--space-3xl) var(--space-md);
    }
}

.cta__inner {
    max-width: 640px;
    margin: 0 auto;
    text-align: center;
}

.cta__title {
    margin: 0 0 var(--space-md);
    font-family: var(--font-display);
    font-size: clamp(1.375rem, 4vw, 2rem);
    font-weight: 700;
    letter-spacing: -0.02em;
}

.cta__lead {
    margin: 0 0 var(--space-xl);
    color: var(--color-text-muted);
    font-size: clamp(0.9375rem, 2.5vw, 1.0625rem);
}

.cta__actions {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    align-items: stretch;
    justify-content: center;
}

@media (min-width: 480px) {
    .cta__actions {
        flex-direction: row;
        flex-wrap: wrap;
        align-items: center;
    }

    .cta__actions .btn {
        width: auto;
    }
}

.cta__actions .btn {
    width: 100%;
}

.cta__note {
    margin: var(--space-lg) 0 0;
    font-size: 0.8125rem;
    color: var(--color-text-muted);
}

.cta__note a {
    color: var(--color-primary);
    text-decoration: underline;
    text-underline-offset: 2px;
}

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

/* Footer */

.site-footer {
    padding: var(--space-xl) var(--space-md) calc(var(--space-xl) + env(safe-area-inset-bottom));
    text-align: center;
    font-size: 0.875rem;
    color: var(--color-text-muted);
    border-top: 1px solid var(--color-border);
}

.site-footer p {
    margin: 0 0 var(--space-xs);
}

.site-footer a {
    color: var(--color-text-muted);
}

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

/* Reveal animation — 自下而上浮动渐显 */

.reveal {
    opacity: 1;
    transform: none;
}

@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(36px);
        transition:
            opacity 520ms var(--motion-ease),
            transform 520ms var(--motion-ease);
        transition-delay: var(--reveal-delay, 0ms);
    }

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

    .reveal--hero.is-visible {
        transition-duration: 640ms;
    }

    /* Hero 主图仅淡入，避免 transform 影响水平居中观感 */
    .hero-showcase__frame.reveal {
        transform: none;
    }

    .hero-showcase__frame.reveal.is-visible {
        transform: none;
    }
}