/*
 * Copyright (c) 2026 Yunyun(云云) By 虚舟实验室(CaelLab) / CaelLabGameTS
 * Licensed under the CaelLab BY-SA Code License, Version 3
 * or any later version. https://www.caellab.com/license/cbs-v3.txt
 * Source: https://github.com/CaelLab-org/GoodPlanCraftLauncher
 */

/* ===== 设计变量 ===== */
:root {
    --bg: #f6fafd;
    --bg-soft: #eaf3fb;
    --surface: #ffffff;
    --surface-2: #f2f7fc;
    --line: rgba(13, 60, 110, 0.09);
    --line-strong: rgba(13, 60, 110, 0.16);

    --accent: #0b7fb8;
    --accent-hover: #0a6ba0;
    --accent-bright: #4fc3f7;
    --accent-soft: rgba(11, 127, 184, 0.09);
    --accent-contrast: #ffffff;

    --text-1: #132a41;
    --text-2: #4b6a89;
    --text-3: #7b95af;

    --radius-sm: 6px;
    --radius: 12px;
    --radius-lg: 16px;
    --shadow-1: 0 1px 2px rgba(13, 60, 110, 0.06);
    --shadow-2: 0 18px 44px -14px rgba(13, 60, 110, 0.28);
    --shadow-window: 0 40px 80px -28px rgba(13, 60, 110, 0.5), 0 12px 30px -12px rgba(13, 60, 110, 0.2), 0 0 0 1px rgba(13, 60, 110, 0.08);
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", sans-serif;
    --font-mono: "Cascadia Code", "JetBrains Mono", Consolas, "Courier New", monospace;
    --nav-h: 64px;
}

/* ===== 基础 ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--nav-h) + 16px); }
body {
    font-family: var(--font-sans);
    background: var(--bg);
    color: var(--text-1);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}
::selection { background: rgba(11, 127, 184, 0.16); }
::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb {
    background: rgba(13, 60, 110, 0.18);
    border-radius: 5px;
    border: 2px solid var(--bg);
}
::-webkit-scrollbar-thumb:hover { background: rgba(13, 60, 110, 0.3); }

a { color: inherit; }
img { max-width: 100%; }
.container { max-width: 1180px; margin: 0 auto; padding: 0 24px; }

section { position: relative; padding: 96px 0; }
.section-header { text-align: center; max-width: 660px; margin: 0 auto 52px; }
.section-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 14px;
    background: var(--accent-soft);
    border: 1px solid rgba(11, 127, 184, 0.2);
    border-radius: 999px;
    color: var(--accent);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 2.5px;
    text-transform: uppercase;
    margin-bottom: 18px;
}
.section-title { font-size: clamp(1.7rem, 3.6vw, 2.3rem); font-weight: 800; letter-spacing: -0.6px; }
.section-desc { color: var(--text-2); margin-top: 12px; font-size: 1.02rem; }

/* ===== 导航 ===== */
nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: var(--nav-h);
    z-index: 1000;
    background: rgba(246, 250, 253, 0.72);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid transparent;
    transition: background 0.3s ease, border-color 0.3s ease;
}
nav.scrolled {
    background: rgba(246, 250, 253, 0.94);
    border-bottom-color: var(--line);
}
.nav-container {
    max-width: 1180px;
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}
.logo { display: flex; align-items: center; flex-shrink: 0; text-decoration: none; }
/* 站点根目录那张 /logo.png 是给深色底画的白色线稿，放到浅色底上要反相才看得见 */
.logo img { height: 34px; width: auto; display: block; filter: invert(1); }
.nav-links { display: flex; align-items: center; gap: 4px; list-style: none; }
.nav-links > li > a,
.nav-links > li > .dropdown { display: block; }
.nav-links a:not(.nav-cta) {
    display: block;
    padding: 8px 14px;
    color: var(--text-2);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    transition: color 0.2s ease, background 0.2s ease;
}
.nav-links a:not(.nav-cta):hover { color: var(--text-1); background: rgba(13, 60, 110, 0.05); }
.nav-cta {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-left: 12px;
    padding: 8px 18px;
    background: var(--accent);
    color: var(--accent-contrast);
    text-decoration: none;
    font-size: 0.88rem;
    font-weight: 800;
    border-radius: var(--radius-sm);
    box-shadow: 0 6px 18px -6px rgba(11, 127, 184, 0.6);
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}
.nav-cta:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 10px 22px -6px rgba(11, 127, 184, 0.62);
}

.lang-switch select {
    margin-left: 6px;
    padding: 7px 10px;
    background: var(--surface-2);
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    color: var(--text-2);
    font-family: var(--font-sans);
    font-size: 0.82rem;
    font-weight: 600;
    cursor: pointer;
}

.lang-switch select:hover,
.lang-switch select:focus-visible {
    border-color: var(--line-strong);
    color: var(--text-1);
    outline: none;
}

/* 源码下拉 */
.dropdown { position: relative; }
.dropdown-toggle {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 8px 14px;
    background: transparent;
    border: none;
    color: var(--text-2);
    font-size: 0.9rem;
    font-weight: 600;
    font-family: inherit;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: color 0.2s ease, background 0.2s ease;
}
.dropdown-toggle:hover { color: var(--text-1); background: rgba(13, 60, 110, 0.05); }
.dropdown-toggle .arrow { font-size: 0.65rem; transition: transform 0.2s ease; }
.dropdown.active .dropdown-toggle .arrow { transform: rotate(180deg); }
.dropdown-menu {
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    min-width: 220px;
    background: var(--surface);
    border: 1px solid var(--line-strong);
    border-radius: var(--radius);
    padding: 8px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity 0.18s ease, transform 0.18s ease, visibility 0.18s;
    box-shadow: var(--shadow-2);
    z-index: 1001;
}
.dropdown.active .dropdown-menu { opacity: 1; visibility: visible; transform: translateY(0); }
.dropdown-menu .menu-label {
    padding: 4px 12px 6px;
    font-family: var(--font-mono);
    font-size: 0.68rem;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--text-3);
}
.dropdown-menu a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 12px;
    color: var(--text-2);
    text-decoration: none;
    font-size: 0.88rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    transition: background 0.15s ease, color 0.15s ease;
}
.dropdown-menu a:hover { background: var(--accent-soft); color: var(--accent); }
.dropdown-menu a svg { flex-shrink: 0; }

/* 移动端菜单 */
.mobile-menu-btn {
    display: none;
    background: none;
    border: 1px solid var(--line-strong);
    border-radius: var(--radius-sm);
    color: var(--text-1);
    font-size: 1.15rem;
    line-height: 1;
    padding: 7px 11px;
    cursor: pointer;
}
.mobile-panel {
    display: none;
    position: fixed;
    top: var(--nav-h);
    left: 0; right: 0;
    z-index: 999;
    background: rgba(246, 250, 253, 0.98);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--line);
    padding: 12px 24px 20px;
}
.mobile-panel.open { display: block; }
.mobile-panel a {
    display: block;
    padding: 12px 8px;
    color: var(--text-1);
    text-decoration: none;
    font-size: 1rem;
    font-weight: 600;
    border-bottom: 1px solid var(--line);
}
.mobile-panel a:last-child { border-bottom: none; }

/* ===== Hero ===== */
.hero {
    position: relative;
    padding: calc(var(--nav-h) + 76px) 24px 84px;
    overflow: hidden;
    background: linear-gradient(180deg, #e6f3fd 0%, #f1f8fd 46%, var(--bg) 100%);
}
.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(11, 127, 184, 0.055) 1px, transparent 1px),
        linear-gradient(90deg, rgba(11, 127, 184, 0.055) 1px, transparent 1px);
    background-size: 40px 40px;
    mask-image: radial-gradient(ellipse 72% 62% at 50% 32%, black 0%, transparent 78%);
    -webkit-mask-image: radial-gradient(ellipse 72% 62% at 50% 32%, black 0%, transparent 78%);
    pointer-events: none;
}
.hero::after {
    content: '';
    position: absolute;
    left: 50%;
    top: -140px;
    transform: translateX(-50%);
    width: 900px;
    height: 420px;
    background: radial-gradient(ellipse, rgba(79, 195, 247, 0.26) 0%, transparent 68%);
    pointer-events: none;
}
.hero-content { position: relative; z-index: 2; text-align: center; max-width: 820px; margin: 0 auto; }
.hero-tags { display: flex; justify-content: center; gap: 10px; flex-wrap: wrap; margin-bottom: 24px; }
.hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 6px 14px;
    background: rgba(255, 255, 255, 0.75);
    border: 1px solid var(--line-strong);
    border-radius: 999px;
    color: var(--text-2);
    font-family: var(--font-mono);
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 1px;
}
.hero-tag .dot {
    width: 6px; height: 6px;
    border-radius: 2px;
    background: var(--accent-bright);
    box-shadow: 0 0 8px rgba(79, 195, 247, 0.8);
}
.hero-icon {
    display: inline-flex;
    padding: 10px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 24px;
    box-shadow: 0 14px 34px -14px rgba(13, 60, 110, 0.4);
    margin-bottom: 24px;
}
.hero-icon img {
    width: 88px;
    height: 88px;
    display: block;
    image-rendering: pixelated;
    border-radius: 16px;
}
.hero h1 {
    font-size: clamp(1.9rem, 5.6vw, 3.4rem);
    font-weight: 900;
    line-height: 1.1;
    letter-spacing: -1.6px;
    color: var(--text-1);
    margin-bottom: 14px;
    overflow-wrap: anywhere;
}
.hero-subtitle {
    font-size: clamp(0.95rem, 2.2vw, 1.1rem);
    font-weight: 700;
    color: var(--accent);
    letter-spacing: 3px;
    margin-bottom: 18px;
}
.hero-desc {
    font-size: 1.06rem;
    color: var(--text-2);
    max-width: 600px;
    margin: 0 auto 32px;
}
.hero-actions { display: flex; justify-content: center; gap: 14px; flex-wrap: wrap; margin-bottom: 28px; }
.hero-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 15px 32px;
    font-size: 1rem;
    font-weight: 800;
    border-radius: var(--radius);
    text-decoration: none;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}
.hero-btn.primary {
    background: var(--accent);
    color: var(--accent-contrast);
    box-shadow: 0 14px 30px -12px rgba(11, 127, 184, 0.75);
}
.hero-btn.primary:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 18px 36px -12px rgba(11, 127, 184, 0.8);
}
.hero-btn.ghost {
    background: rgba(255, 255, 255, 0.7);
    border: 1px solid var(--line-strong);
    color: var(--text-1);
}
.hero-btn.ghost:hover {
    border-color: rgba(11, 127, 184, 0.4);
    background: #fff;
    transform: translateY(-2px);
}
.hero-meta {
    display: flex;
    justify-content: center;
    gap: 10px 26px;
    flex-wrap: wrap;
    color: var(--text-3);
    font-family: var(--font-mono);
    font-size: 0.82rem;
}
.hero-meta span { display: inline-flex; align-items: center; gap: 7px; }
.hero-meta b { color: var(--text-2); font-weight: 700; }
.hero-meta .sep { opacity: 0.45; }

/* 漂浮像素 */
.float-pixel {
    position: absolute;
    width: 10px;
    height: 10px;
    border-radius: 2px;
    background: var(--accent-bright);
    opacity: 0.3;
    animation: floatUp 9s ease-in-out infinite;
    pointer-events: none;
    z-index: 1;
}
@keyframes floatUp {
    0%, 100% { transform: translateY(0) rotate(0deg); opacity: 0.18; }
    50% { transform: translateY(-24px) rotate(45deg); opacity: 0.42; }
}

/* ===== 产品窗口 ===== */
.window-stage { position: relative; margin: 56px auto 0; max-width: 1040px; perspective: 1600px; }
.window-stage::after {
    content: '';
    position: absolute;
    left: 8%;
    right: 8%;
    bottom: -34px;
    height: 60px;
    background: radial-gradient(ellipse at center, rgba(11, 127, 184, 0.22) 0%, transparent 70%);
    filter: blur(14px);
    pointer-events: none;
}
.window {
    position: relative;
    border-radius: 14px;
    overflow: hidden;
    background: #0d1425;
    box-shadow: var(--shadow-window);
    transform: rotateX(var(--tilt-x, 0deg)) rotateY(var(--tilt-y, 0deg));
    transition: transform 0.5s cubic-bezier(0.22, 1, 0.36, 1);
    will-change: transform;
}
.window iframe {
    display: block;
    width: 100%;
    aspect-ratio: 1000 / 620;
    border: 0;
    background: #0d1425;
}
.window-note {
    text-align: center;
    margin-top: 26px;
    color: var(--text-3);
    font-size: 0.88rem;
}
.window-note b { color: var(--text-2); }

/* ===== 功能 ===== */
.features { background: var(--bg-soft); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.features-grid {
    max-width: 1180px;
    margin: 0 auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}
.feature-card {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 26px 24px;
    transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}
.feature-card:hover {
    transform: translateY(-4px);
    border-color: rgba(11, 127, 184, 0.34);
    box-shadow: 0 18px 34px -20px rgba(13, 60, 110, 0.5);
}
.feature-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border-radius: 10px;
    background: var(--accent-soft);
    border: 1px solid rgba(11, 127, 184, 0.18);
    color: var(--accent);
    margin-bottom: 16px;
}
.feature-icon svg { width: 21px; height: 21px; }
.feature-card h3 { font-size: 1.02rem; font-weight: 700; margin-bottom: 7px; }
.feature-card p { color: var(--text-2); font-size: 0.9rem; }
.feature-link {
    color: var(--accent);
    text-decoration: none;
    border-bottom: 1px dashed rgba(11, 127, 184, 0.4);
    white-space: nowrap;
}
.feature-link:hover { color: var(--accent-hover); border-bottom-color: var(--accent-hover); }

/* ===== 真机截图 ===== */
.shot-gallery {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 26px 22px;
    max-width: 1040px;
    margin: 0 auto;
}
.shot img {
    display: block;
    width: 100%;
    border: 1px solid var(--line-strong);
    border-radius: 12px;
    box-shadow: 0 22px 46px -28px rgba(13, 60, 110, 0.55);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.shot:hover img {
    transform: translateY(-3px);
    box-shadow: 0 28px 56px -28px rgba(13, 60, 110, 0.6);
}
.shot figcaption { margin-top: 12px; font-size: 0.88rem; color: var(--text-2); text-align: center; }

/* ===== 下载 ===== */
.download {
    background:
        radial-gradient(ellipse 60% 80% at 50% 110%, rgba(79, 195, 247, 0.14) 0%, transparent 70%),
        var(--bg-soft);
    border-top: 1px solid var(--line);
    text-align: center;
}
.download-card {
    max-width: 620px;
    margin: 0 auto;
    background: var(--surface);
    border: 1px solid var(--line-strong);
    border-radius: var(--radius-lg);
    padding: 42px 40px;
    box-shadow: 0 24px 60px -34px rgba(13, 60, 110, 0.5);
}
.download-card .dl-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    border-radius: var(--radius);
    background: var(--accent-soft);
    border: 1px solid rgba(11, 127, 184, 0.2);
    color: var(--accent);
    margin-bottom: 18px;
}
.download-card .dl-icon svg { width: 26px; height: 26px; }
.download-file {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--text-2);
    background: var(--surface-2);
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    display: inline-block;
    padding: 8px 18px;
    margin-bottom: 24px;
}
.download-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    justify-content: center;
    padding: 17px 32px;
    background: var(--accent);
    color: var(--accent-contrast);
    text-decoration: none;
    font-size: 1.06rem;
    font-weight: 800;
    border-radius: var(--radius);
    box-shadow: 0 16px 34px -14px rgba(11, 127, 184, 0.8);
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}
.download-btn:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 20px 40px -14px rgba(11, 127, 184, 0.85);
}
.update-info {
    display: flex;
    justify-content: center;
    gap: 8px 22px;
    flex-wrap: wrap;
    margin-top: 20px;
    color: var(--text-3);
    font-size: 0.86rem;
}
.update-info span b { color: var(--text-2); font-weight: 700; }
.download-extra { margin-top: 26px; padding-top: 22px; border-top: 1px solid var(--line); }
.download-extra .hero-btn { padding: 11px 22px; font-size: 0.9rem; }
.download-extra .hero-btn + .hero-btn { margin-left: 10px; }
.dl-more {
    display: inline-block;
    margin-top: 18px;
    color: var(--accent);
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
}
.dl-more:hover { text-decoration: underline; }

/* ===== 系统要求 ===== */
.requirements { background: var(--bg); }
.req-grid {
    max-width: 1180px;
    margin: 0 auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}
.req-card {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 24px 22px;
    transition: border-color 0.25s ease, transform 0.25s ease;
}
.req-card:hover { border-color: rgba(11, 127, 184, 0.34); transform: translateY(-3px); }
.req-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-mono);
    font-size: 0.74rem;
    font-weight: 700;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 12px;
}
.req-card p { color: var(--text-2); font-size: 0.9rem; }

/* ===== 开源 ===== */
.opensource {
    background:
        radial-gradient(ellipse 50% 60% at 15% 0%, rgba(79, 195, 247, 0.1) 0%, transparent 60%),
        radial-gradient(ellipse 50% 60% at 85% 100%, rgba(79, 195, 247, 0.1) 0%, transparent 60%),
        var(--bg-soft);
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
}
.opensource-grid {
    max-width: 1180px;
    margin: 0 auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}
.opensource-card {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 30px 28px;
    transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}
.opensource-card:hover {
    transform: translateY(-4px);
    border-color: rgba(11, 127, 184, 0.34);
    box-shadow: 0 18px 34px -20px rgba(13, 60, 110, 0.5);
}
.opensource-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border-radius: 10px;
    background: var(--accent-soft);
    border: 1px solid rgba(11, 127, 184, 0.18);
    color: var(--accent);
    margin-bottom: 16px;
}
.opensource-icon svg { width: 21px; height: 21px; }
.opensource-card h3 { font-size: 1.08rem; font-weight: 700; margin-bottom: 10px; }
.opensource-card p { color: var(--text-2); font-size: 0.92rem; margin-bottom: 16px; }
.opensource-card a {
    color: var(--accent);
    font-weight: 700;
    font-size: 0.92rem;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: gap 0.2s ease, opacity 0.2s ease;
}
.opensource-card a:hover { gap: 10px; opacity: 0.85; }

.license-box {
    max-width: 1180px;
    margin: 16px auto 0;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    overflow: hidden;
}
.license-box summary {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 15px 20px;
    background: var(--surface-2);
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--text-2);
    cursor: pointer;
    list-style: none;
}
.license-box summary::-webkit-details-marker { display: none; }
.license-box summary::after {
    content: '展开';
    margin-left: auto;
    font-size: 0.72rem;
    color: var(--accent);
    letter-spacing: 1px;
}
.license-box[open] summary::after { content: '收起'; }
.license-box summary .dot { width: 9px; height: 9px; border-radius: 3px; background: rgba(13, 60, 110, 0.18); }
.license-box pre {
    padding: 22px 24px;
    color: var(--text-2);
    font-family: var(--font-mono);
    font-size: 0.78rem;
    line-height: 1.75;
    white-space: pre-wrap;
    word-break: break-word;
    border-top: 1px solid var(--line);
}

/* ===== 版本历史 ===== */
.history { background: var(--bg); }
.timeline {
    max-width: 780px;
    margin: 0 auto;
    padding: 0 24px;
    position: relative;
}
.timeline::before {
    content: '';
    position: absolute;
    top: 6px;
    bottom: 6px;
    left: 33px;
    width: 2px;
    background: linear-gradient(180deg, rgba(11, 127, 184, 0.35) 0%, rgba(11, 127, 184, 0.04) 100%);
}
.timeline-item { position: relative; padding: 0 0 14px 68px; }
.timeline-dot {
    position: absolute;
    left: 26px;
    top: 6px;
    width: 16px;
    height: 16px;
    border-radius: 5px;
    background: var(--accent);
    border: 2px solid var(--surface);
    box-shadow: 0 0 0 2px rgba(11, 127, 184, 0.3);
}
.timeline-item:nth-child(n+2) .timeline-dot {
    background: var(--surface-2);
    border-color: var(--surface);
    box-shadow: 0 0 0 2px var(--line-strong);
}
.timeline-item:nth-child(n+2) { padding-bottom: 12px; }
.version-info { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; margin-bottom: 8px; }
.version-title { font-size: 1.02rem; font-weight: 700; color: var(--text-1); }
.version-number {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--accent);
    background: var(--accent-soft);
    border: 1px solid rgba(11, 127, 184, 0.2);
    padding: 2px 10px;
    border-radius: 999px;
}
.timeline-item:nth-child(n+2) .version-number {
    color: var(--text-2);
    background: var(--surface-2);
    border-color: var(--line);
}
.latest-chip {
    font-size: 0.7rem;
    font-weight: 800;
    letter-spacing: 1px;
    color: var(--accent-contrast);
    background: var(--accent);
    padding: 2px 9px;
    border-radius: 999px;
}
.version-date { color: var(--text-3); font-size: 0.82rem; font-family: var(--font-mono); }
.changelog { list-style: none; }
.changelog li {
    position: relative;
    padding-left: 16px;
    color: var(--text-2);
    font-size: 0.9rem;
    line-height: 1.75;
}
.changelog li::before {
    content: '';
    position: absolute;
    left: 2px;
    top: 0.72em;
    width: 5px;
    height: 5px;
    border-radius: 1px;
    background: var(--text-3);
    opacity: 0.55;
}
.older-versions summary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin: 8px 0 0 68px;
    padding: 9px 18px;
    background: var(--surface);
    border: 1px solid var(--line-strong);
    border-radius: 999px;
    color: var(--text-2);
    font-size: 0.88rem;
    font-weight: 700;
    cursor: pointer;
    list-style: none;
    transition: all 0.2s ease;
}
.older-versions summary::-webkit-details-marker { display: none; }
.older-versions summary:hover { border-color: rgba(11, 127, 184, 0.4); color: var(--text-1); }
.older-versions[open] summary { margin-bottom: 22px; }

.history-more { margin-top: 30px; padding-left: 68px; }
.history-more a {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: var(--surface);
    border: 1px solid var(--line-strong);
    border-radius: 999px;
    color: var(--text-1);
    font-size: 0.88rem;
    font-weight: 700;
    text-decoration: none;
    transition: color 0.2s ease, border-color 0.2s ease;
}
.history-more a:hover { color: var(--accent); border-color: rgba(11, 127, 184, 0.4); }

/* ===== 页脚 ===== */
footer {
    background: var(--bg-soft);
    border-top: 1px solid var(--line);
    padding: 64px 0 32px;
}
.footer-content {
    max-width: 1180px;
    margin: 0 auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
}
.footer-brand img { height: 56px; width: auto; display: block; margin-bottom: 18px; }
.footer-brand p { color: var(--text-2); font-size: 0.9rem; max-width: 300px; }
.footer-links h4 {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--text-3);
    margin-bottom: 16px;
}
.footer-links ul { list-style: none; }
.footer-links li { margin-bottom: 10px; }
.footer-links a { color: var(--text-2); text-decoration: none; font-size: 0.9rem; transition: color 0.2s ease; }
.footer-links a:hover { color: var(--accent); }
.footer-bottom {
    max-width: 1180px;
    margin: 40px auto 0;
    padding: 24px 24px 0;
    border-top: 1px solid var(--line);
    display: flex;
    flex-direction: column;
    gap: 8px;
    color: var(--text-3);
    font-size: 0.82rem;
    line-height: 1.8;
}
.footer-bottom p { max-width: 1000px; }
.footer-inline-link {
    color: var(--text-2);
    text-decoration: underline;
    text-decoration-color: rgba(75, 106, 137, 0.3);
    text-underline-offset: 3px;
    transition: color 0.2s ease, text-decoration-color 0.2s ease;
}
.footer-inline-link:hover { color: var(--accent); text-decoration-color: var(--accent); }

/* ===== 动效 ===== */
html.js .reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}
html.js .reveal.active { opacity: 1; transform: translateY(0); }
html.js .reveal:nth-child(2) { transition-delay: 0.06s; }
html.js .reveal:nth-child(3) { transition-delay: 0.12s; }
html.js .reveal:nth-child(4) { transition-delay: 0.18s; }

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    html.js .reveal { opacity: 1; transform: none; }
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .features-grid { grid-template-columns: repeat(2, 1fr); }
    .req-grid { grid-template-columns: repeat(2, 1fr); }
    .shot-gallery { grid-template-columns: 1fr; }
    .footer-content { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
    section { padding: 66px 0; }
    .nav-links { display: none; }
    .mobile-menu-btn { display: block; }
    .mobile-panel.open { display: block; }
    .hero { padding-top: calc(var(--nav-h) + 52px); padding-bottom: 60px; }
    .hero-icon img { width: 72px; height: 72px; }
    .window-stage { margin-top: 38px; perspective: none; }
    .window { transform: none; }
    .features-grid, .req-grid, .opensource-grid { grid-template-columns: 1fr; }
    .download-card { padding: 32px 22px; }
    .timeline::before { left: 21px; }
    .timeline-item { padding-left: 50px; }
    .timeline-dot { left: 14px; }
    .older-versions summary { margin-left: 50px; }
    .history-more { padding-left: 50px; }
    .footer-content { grid-template-columns: 1fr; gap: 28px; }
}