/* ============================================================
   x6o4 Reader 官方网站 — 极简纸墨风格样式表
   ============================================================ */

/* ----- 1. 变量与主题定义 ----- */
:root {
    /* 纸墨核心配色 */
    --bg-warm: #F7F6F4;          /* 暖白纸张色 */
    --bg-card: #FFFFFF;          /* 卡片纯白 */
    --ink-dark: #333344;         /* 浓墨蓝黑 */
    --ink-medium: #4D4D5C;       /* 中度墨色 */
    --ink-muted: #7E7E8A;        /* 灰淡烟墨 */
    --ink-divider: #E4E3E0;      /* 印纸粉线 */
    
    /* 情绪点缀色 */
    --accent-green: #81C784;     /* 治愈绿，用于轻松、无压力、已读状态 */
    --accent-peach: #E57373;     /* 温暖珊瑚红，用于情绪消散、对比 */
    --accent-gold: #FBC02D;      /* 暖阳金，用于收藏、历史高亮 */
    --accent-blue: #78909C;       /* 灰蓝，用于极简克制感 */

    /* 物理属性 */
    --shadow-paper: 0 4px 16px rgba(51, 51, 68, 0.04);
    --shadow-float: 0 12px 32px rgba(51, 51, 68, 0.08);
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --max-width: 1100px;

    /* 字体族 */
    --font-inter: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    --font-serif: "Literata", "Georgia", "Source Han Serif CN", "Noto Serif CJK SC", "Songti SC", serif;
}

/* ----- 2. 全局重置与基础 ----- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-sans);
    color: var(--ink-dark);
    background-color: var(--bg-warm);
    line-height: 1.75;
    overflow-x: hidden;
}

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

a {
    color: inherit;
    text-decoration: none;
    transition: color 0.2s, opacity 0.2s;
}

button {
    border: none;
    background: none;
    cursor: pointer;
    font-family: inherit;
    outline: none;
}

.skip-link {
    position: absolute;
    top: -100px;
    left: 20px;
    z-index: 1000;
    background: var(--ink-dark);
    color: var(--bg-warm);
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
}

.skip-link:focus {
    top: 12px;
}

/* ----- 3. 布局工具与全局元素 ----- */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 100px 0;
}

.section-title {
    font-size: 2.25rem;
    font-weight: 800;
    text-align: center;
    margin-bottom: 12px;
    letter-spacing: -0.03em;
    color: var(--ink-dark);
}

.section-title span.highlight {
    color: var(--accent-green);
    position: relative;
    display: inline-block;
}

.section-title span.highlight::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 0;
    width: 100%;
    height: 6px;
    background-color: rgba(129, 199, 132, 0.25);
    z-index: -1;
    border-radius: 3px;
}

.section-desc {
    text-align: center;
    color: var(--ink-muted);
    font-size: 1.05rem;
    margin-bottom: 60px;
    max-width: 580px;
    margin-left: auto;
    margin-right: auto;
}

/* ----- 4. 固定导航栏 ----- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 64px;
    background: rgba(247, 246, 244, 0.85); /* 匹配 warm base */
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--ink-divider);
    z-index: 200;
    transform: translateY(-100%);
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.navbar.visible {
    transform: translateY(0);
}

.navbar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.navbar-logo {
    font-size: 1.15rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--ink-dark);
}

.navbar-logo svg {
    width: 22px;
    height: 22px;
}

.navbar-menu {
    display: flex;
    gap: 28px;
}

.navbar-menu a {
    font-size: 0.92rem;
    font-weight: 500;
    color: var(--ink-medium);
}

.navbar-menu a:hover {
    color: var(--ink-dark);
}

.navbar-cta {
    font-size: 0.85rem;
    padding: 8px 18px;
    border-radius: 30px;
    background: var(--ink-dark);
    color: var(--bg-warm);
    font-weight: 600;
    border: 1.5px solid var(--ink-dark);
    transition: background 0.2s, color 0.2s;
}

.navbar-cta:hover {
    background: transparent;
    color: var(--ink-dark);
}

.navbar-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}

.lang-toggle {
    font-size: 0.78rem;
    padding: 6px 12px;
    border-radius: 30px;
    border: 1.5px solid var(--ink-divider);
    background: transparent;
    color: var(--ink-medium);
    font-weight: 500;
    cursor: pointer;
    transition: border-color 0.2s, color 0.2s;
    font-family: inherit;
    white-space: nowrap;
}

.lang-toggle:hover {
    border-color: var(--ink-dark);
    color: var(--ink-dark);
}

/* Mobile Nav Toggle (simple layout fallback) */
@media (max-width: 768px) {
    .navbar-menu {
        display: none;
    }
}

/* ----- 5. Hero Section (首屏) ----- */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
    padding: 100px 0 60px;
    background: radial-gradient(circle at 80% 20%, rgba(228, 227, 224, 0.4) 0%, rgba(247, 246, 244, 1) 70%);
}

.hero-layout {
    display: flex;
    align-items: center;
    gap: 64px;
}

.hero-content {
    flex: 1.1;
    min-width: 0;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--bg-card);
    border: 1px solid var(--ink-divider);
    padding: 6px 14px;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--ink-medium);
    margin-bottom: 24px;
    box-shadow: var(--shadow-paper);
}

.hero-badge .badge-dot {
    width: 6px;
    height: 6px;
    background-color: var(--accent-green);
    border-radius: 50%;
    animation: pulse 1.8s infinite;
}

@keyframes pulse {
    0% { transform: scale(0.9); opacity: 0.6; }
    50% { transform: scale(1.2); opacity: 1; }
    100% { transform: scale(0.9); opacity: 0.6; }
}

.hero-title {
    font-size: 4rem;
    font-weight: 850;
    letter-spacing: -0.04em;
    line-height: 1.1;
    color: var(--ink-dark);
    margin-bottom: 18px;
}

.hero-subtitle {
    font-size: 1.6rem;
    color: var(--ink-medium);
    margin-bottom: 28px;
    font-weight: 500;
    letter-spacing: -0.01em;
    line-height: 1.4;
}

.hero-desc {
    font-size: 1.05rem;
    color: var(--ink-muted);
    line-height: 1.8;
    margin-bottom: 40px;
    max-width: 500px;
}

.hero-actions {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--ink-dark);
    color: var(--bg-warm);
    padding: 14px 28px;
    border-radius: var(--radius-md);
    font-weight: 700;
    font-size: 1rem;
    box-shadow: var(--shadow-paper);
    transition: transform 0.2s, background-color 0.2s;
    border: 2px solid var(--ink-dark);
}

.btn-primary:hover {
    transform: translateY(-2px);
    background-color: #222233;
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--bg-card);
    color: var(--ink-dark);
    padding: 14px 28px;
    border-radius: var(--radius-md);
    font-weight: 700;
    font-size: 1rem;
    border: 2px solid var(--ink-divider);
    transition: transform 0.2s, background-color 0.2s, border-color 0.2s;
}

.btn-secondary:hover {
    transform: translateY(-2px);
    background-color: var(--bg-warm);
    border-color: var(--ink-dark);
}

/* Play商店徽章占位 */
.store-badges {
    display: flex;
    gap: 14px;
    margin-top: 32px;
    align-items: center;
}

.store-badge-placeholder {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.78rem;
    color: var(--ink-muted);
    background: rgba(228, 227, 224, 0.3);
    border: 1px dashed var(--ink-muted);
    padding: 6px 14px;
    border-radius: var(--radius-sm);
}

.store-badge-gplay {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: #1c1c1e;
    color: #fff;
    padding: 14px 28px;
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: opacity 0.18s;
}
.store-badge-gplay:hover { opacity: 0.82; }
.store-badge-gplay .badge-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}
.store-badge-gplay .badge-text small {
    font-size: 0.6rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    opacity: 0.75;
}
.store-badge-gplay .badge-text strong {
    font-size: 0.95rem;
    font-weight: 600;
}

/* Scroll Hint (向下滚动提示) */
.scroll-hint {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    color: var(--ink-muted);
    font-size: 0.8rem;
    font-weight: 600;
    animation: bounceDown 2s infinite;
    cursor: pointer;
}

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

/* ----- 6. UI Mockups (纯 CSS/SVG 机身及微缩界面，高拟真度) ----- */
.phone-mockup {
    width: 290px;
    height: 580px;
    background: var(--ink-dark);
    border-radius: 40px;
    padding: 11px;
    box-shadow: var(--shadow-float);
    position: relative;
    border: 4px solid #4D4D5C;
    flex-shrink: 0;
}

/* 听筒/前置胶囊 */
.phone-mockup::before {
    content: '';
    position: absolute;
    top: 16px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 14px;
    background: #000;
    border-radius: 10px;
    z-index: 10;
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: var(--bg-warm);
    border-radius: 32px;
    overflow: hidden;
    position: relative;
    display: flex;
    flex-direction: column;
}

/* ----- 特性：首屏 Swipe/垂直划卡模拟器 ----- */
.swipe-container {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    padding: 40px 16px 16px;
}

.swipe-header {
    height: 32px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1.5px solid var(--ink-divider);
    padding-bottom: 8px;
    margin-bottom: 12px;
}

.swipe-header .logo-slug {
    font-size: 0.85rem;
    font-weight: 850;
    color: var(--ink-dark);
}

.swipe-header .status-dots {
    display: flex;
    gap: 4px;
}

.swipe-header .status-dots span {
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--ink-muted);
}

.swipe-card-stack {
    position: relative;
    flex: 1;
    perspective: 800px;
}

.swipe-card {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 90%;
    background: var(--bg-card);
    border: 1.5px solid var(--ink-dark);
    border-radius: var(--radius-md);
    padding: 16px;
    box-shadow: 0 4px 12px rgba(51, 51, 68, 0.05);
    display: flex;
    flex-direction: column;
    transform-origin: bottom center;
}

.swipe-card .meta {
    font-size: 0.7rem;
    color: var(--ink-muted);
    font-weight: 600;
    margin-bottom: 8px;
    text-transform: uppercase;
}

.swipe-card .title {
    font-size: 1.05rem;
    font-weight: 800;
    line-height: 1.35;
    color: var(--ink-dark);
    margin-bottom: 12px;
}

.swipe-card .excerpt {
    font-size: 0.78rem;
    color: var(--ink-medium);
    line-height: 1.6;
    flex: 1;
}

.swipe-card .excerpt p {
    margin-bottom: 6px;
}

/* 绘制卡片图的纯CSS线条 */
.skeleton-line {
    height: 6px;
    background: var(--ink-divider);
    margin-bottom: 6px;
    border-radius: 3px;
}

.skeleton-line.short { width: 60%; }
.skeleton-line.medium { width: 85%; }
.skeleton-line.long { width: 100%; }

.swipe-card .footer-info {
    height: 24px;
    border-top: 1px solid var(--ink-divider);
    padding-top: 8px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.65rem;
    color: var(--ink-muted);
    font-weight: 500;
}

/* 核心向上划卡动画实现 */
.swipe-card.c1 {
    animation: swipeUpLoop1 7s infinite cubic-bezier(0.23, 1, 0.32, 1);
}
.swipe-card.c2 {
    animation: swipeUpLoop2 7s infinite cubic-bezier(0.23, 1, 0.32, 1);
}
.swipe-card.c3 {
    animation: swipeUpLoop3 7s infinite cubic-bezier(0.23, 1, 0.32, 1);
}

@keyframes swipeUpLoop1 {
    0% { transform: translateY(0) rotate(0) scale(1); opacity: 1; z-index: 3; }
    22% { transform: translateY(0) rotate(0) scale(1); opacity: 1; z-index: 3; }
    30% { transform: translateY(-115%) rotate(-6deg) scale(0.95); opacity: 0; z-index: 3; }
    31% { transform: translateY(12px) scale(0.9); opacity: 0; z-index: 1; }
    35% { transform: translateY(12px) scale(0.9); opacity: 0.5; z-index: 1; }
    60% { transform: translateY(12px) scale(0.9); opacity: 0.6; z-index: 1; }
    66% { transform: translateY(6px) scale(0.95); opacity: 0.9; z-index: 2; }
    100% { transform: translateY(0) rotate(0) scale(1); opacity: 1; z-index: 3; }
}

@keyframes swipeUpLoop2 {
    0% { transform: translateY(6px) scale(0.95); opacity: 0.9; z-index: 2; }
    22% { transform: translateY(6px) scale(0.95); opacity: 0.9; z-index: 2; }
    30% { transform: translateY(0) rotate(0) scale(1); opacity: 1; z-index: 3; }
    55% { transform: translateY(0) rotate(0) scale(1); opacity: 1; z-index: 3; }
    63% { transform: translateY(-115%) rotate(6deg) scale(0.95); opacity: 0; z-index: 3; }
    64% { transform: translateY(12px) scale(0.9); opacity: 0; z-index: 1; }
    68% { transform: translateY(12px) scale(0.9); opacity: 0.5; z-index: 1; }
    100% { transform: translateY(6px) scale(0.95); opacity: 0.9; z-index: 2; }
}

@keyframes swipeUpLoop3 {
    0% { transform: translateY(12px) scale(0.9); opacity: 0.6; z-index: 1; }
    22% { transform: translateY(12px) scale(0.9); opacity: 0.6; z-index: 1; }
    30% { transform: translateY(6px) scale(0.95); opacity: 0.9; z-index: 2; }
    55% { transform: translateY(6px) scale(0.95); opacity: 0.9; z-index: 2; }
    63% { transform: translateY(0) rotate(0) scale(1); opacity: 1; z-index: 3; }
    88% { transform: translateY(0) rotate(0) scale(1); opacity: 1; z-index: 3; }
    96% { transform: translateY(-115%) rotate(-4deg) scale(0.95); opacity: 0; z-index: 3; }
    97% { transform: translateY(12px) scale(0.9); opacity: 0; z-index: 1; }
    100% { transform: translateY(12px) scale(0.9); opacity: 0.6; z-index: 1; }
}

/* 手势提示：一个淡出虚线手指上下滑动 */
.swipe-indicator-hand {
    position: absolute;
    bottom: 24px;
    right: 24px;
    z-index: 10;
    pointer-events: none;
    animation: handSwipe 3.5s infinite ease-in-out;
    color: var(--ink-dark);
}

@keyframes handSwipe {
    0% { transform: translateY(30px); opacity: 0; }
    20% { transform: translateY(30px); opacity: 1; }
    60% { transform: translateY(-60px); opacity: 0.5; }
    80%, 100% { transform: translateY(-60px); opacity: 0; }
}

/* ----- 7. “零未读压力”对比展台 (Concept) ----- */
.concept {
    padding: 100px 0;
    background: var(--bg-card);
    border-top: 1px solid var(--ink-divider);
    border-bottom: 1px solid var(--ink-divider);
}

.stress-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 48px;
    margin-top: 60px;
    flex-wrap: wrap;
}

.stress-card {
    background: var(--bg-warm);
    border: 2px solid var(--ink-divider);
    border-radius: var(--radius-lg);
    padding: 32px;
    width: 320px;
    text-align: center;
    position: relative;
    box-shadow: var(--shadow-paper);
    transition: transform 0.2s, border-color 0.2s;
}

.stress-card:hover {
    transform: translateY(-4px);
}

.stress-card.traditional {
    border-color: rgba(229, 115, 115, 0.4);
}

.stress-card.x6o4 {
    border-color: rgba(129, 199, 132, 0.5);
    background: linear-gradient(180deg, var(--bg-warm) 0%, rgba(129, 199, 132, 0.05) 100%);
}

.stress-header {
    font-size: 1.1rem;
    font-weight: 750;
    margin-bottom: 16px;
    color: var(--ink-dark);
}

.stress-badge-traditional {
    position: absolute;
    top: 18px;
    right: 18px;
    background: var(--accent-peach);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 3px 8px;
    border-radius: 20px;
    text-transform: uppercase;
}

.stress-badge-x6o4 {
    position: absolute;
    top: 18px;
    right: 18px;
    background: var(--accent-green);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 3px 8px;
    border-radius: 20px;
    text-transform: uppercase;
}

/* 舒压动画：左侧剧烈抖动红数字，突然被气流吹成右侧的宁静绿意 */
.visual-box {
    height: 120px;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 24px;
}

/* 传统红点抖动的信封 */
.stress-traditional-envelope {
    width: 80px;
    height: 60px;
    border: 2px solid var(--ink-dark);
    background: #fff;
    border-radius: var(--radius-sm);
    position: relative;
    animation: shakeTraditional 1.5s infinite ease-in-out;
}

.stress-traditional-envelope::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, transparent 48%, var(--ink-dark) 50%, transparent 52%);
}

.stress-badge-circle {
    position: absolute;
    top: -12px;
    right: -12px;
    width: 30px;
    height: 30px;
    background-color: var(--accent-peach);
    color: white;
    border: 2.5px solid var(--ink-dark);
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 50%;
    font-size: 0.72rem;
    font-weight: bold;
    animation: heartBeatRed 1s infinite alternate;
}

@keyframes shakeTraditional {
    0%, 100% { transform: rotate(0) translateY(0); }
    10%, 30%, 50% { transform: rotate(-3deg) translateY(-2px); }
    20%, 40%, 60% { transform: rotate(3deg) translateY(1px); }
    70% { transform: rotate(-1deg) translateY(0); }
    80% { transform: rotate(1deg) translateY(0); }
}

@keyframes heartBeatRed {
    0% { transform: scale(1); box-shadow: 0 0 0 0 rgba(229, 115, 115, 0.4); }
    100% { transform: scale(1.15); box-shadow: 0 0 12px 6px rgba(229, 115, 115, 0.15); }
}

/* 右侧：消逝动画 - 模拟一个红圈碎裂、浮现叶子的奇妙CSS环路 */
.stress-x6o4-leaf {
    position: relative;
    width: 80px;
    height: 80px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.stress-x6o4-leaf svg.leaf-svg {
    width: 58px;
    height: 58px;
    fill: var(--accent-green);
    animation: breathingLeaf 4s infinite ease-in-out;
    filter: drop-shadow(0 2px 6px rgba(129, 199, 132, 0.15));
}

/* 背景虚化的茶杯雾气 */
.relax-tea-steam {
    position: absolute;
    top: -10px;
    width: 32px;
    height: 24px;
    display: flex;
    justify-content: space-around;
}

.relax-tea-steam span {
    width: 2px;
    height: 100%;
    background: var(--accent-green);
    opacity: 0;
    border-radius: 1px;
    animation: steamRising 2.5s infinite ease-in-out;
}

.relax-tea-steam span:nth-child(1) { animation-delay: 0.2s; }
.relax-tea-steam span:nth-child(2) { animation-delay: 0.9s; }
.relax-tea-steam span:nth-child(3) { animation-delay: 1.5s; }

@keyframes steamRising {
    0% { transform: translateY(10px) scaleX(1); opacity: 0; }
    50% { transform: translateY(0px) scaleX(1.3); opacity: 0.5; }
    100% { transform: translateY(-15px) scaleX(0.8); opacity: 0; }
}

@keyframes breathingLeaf {
    0%, 100% { transform: scale(0.95) rotate(-2deg); }
    50% { transform: scale(1.05) rotate(5deg); }
}

.stress-desc {
    font-size: 0.9rem;
    color: var(--ink-muted);
    line-height: 1.6;
}

.stress-desc strong {
    color: var(--ink-dark);
}

.stress-indicator-arrow {
    font-size: 2rem;
    color: var(--ink-muted);
    animation: arrowPulse 2s infinite ease-in-out;
}

@keyframes arrowPulse {
    0%, 100% { transform: translateX(0); opacity: 0.4; }
    50% { transform: translateX(10px); opacity: 1; }
}

@media (max-width: 768px) {
    .stress-indicator-arrow {
        transform: rotate(90deg);
        animation: arrowPulseV 2s infinite ease-in-out;
    }
}

@keyframes arrowPulseV {
    0%, 100% { transform: rotate(90deg) translateX(0); opacity: 0.4; }
    50% { transform: rotate(90deg) translateX(10px); opacity: 1; }
}

/* 数据递增效果板块 */
.stress-metrics {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-top: 60px;
    flex-wrap: wrap;
    background: var(--bg-warm);
    padding: 32px;
    border-radius: var(--radius-lg);
    border: 1px dashed var(--ink-divider);
}

.metric-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    flex: 1;
    min-width: 140px;
}

.metric-number {
    font-size: 2.75rem;
    font-weight: 850;
    color: var(--ink-dark);
    margin-bottom: 4px;
    display: flex;
    align-items: center;
}

.metric-number .highlight {
    background: linear-gradient(135deg, var(--ink-dark), var(--accent-green));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.metric-label {
    font-size: 0.85rem;
    color: var(--ink-muted);
    font-weight: 600;
}

/* ----- 8. 亮点功能深度展台 (Features Grid) ----- */
.features-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    margin-top: 40px;
}

@media (max-width: 900px) {
    .features-container {
        grid-template-columns: 1fr;
    }
}

/* 长排卡片框架 */
.custom-feature-card {
    background: var(--bg-card);
    border: 2.5px solid var(--ink-dark);
    border-radius: var(--radius-lg);
    padding: 38px;
    box-shadow: var(--shadow-paper);
    display: flex;
    flex-direction: column;
    gap: 16px;
    justify-content: space-between;
    transition: transform 0.3s, box-shadow 0.3s;
    height: 480px;
}

.custom-feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-float);
}

.feature-info h3 {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--ink-dark);
    margin-bottom: 12px;
}

.feature-info p {
    font-size: 0.95rem;
    color: var(--ink-muted);
    line-height: 1.7;
}

.feature-showcase {
    flex: 1;
    width: 100%;
    border-radius: var(--radius-md);
    background: var(--bg-warm);
    border: 1.5px solid var(--ink-divider);
    overflow: hidden;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* --- 特性亮点一展架：搜索和星标探照灯结构 --- */
.search-mockup-wrap {
    width: 90%;
    height: 85%;
    display: flex;
    flex-direction: column;
    padding: 12px;
    gap: 12px;
}

.search-input-box {
    background: #fff;
    border: 1.5px solid var(--ink-dark);
    border-radius: var(--radius-sm);
    padding: 6px 12px;
    display: flex;
    align-items: center;
    gap: 8px;
    position: relative;
}

.search-input-box svg {
    width: 14px;
    height: 14px;
    color: var(--ink-muted);
}

.search-text-typing {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--ink-dark);
    width: calc(100% - 24px);
}

.search-typing-cursor {
    display: inline-block;
    width: 2px;
    height: 12px;
    background: var(--ink-dark);
    animation: blinkCursor 0.8s infinite;
}

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

.search-results-list {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 8px;
    position: relative;
}

.search-result-item {
    background: #fff;
    border: 1px solid var(--ink-divider);
    border-radius: var(--radius-sm);
    padding: 8px 12px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.search-result-item::before {
    /* 探照灯扫射层：纯 CSS 放射径向渐变 */
    content: '';
    position: absolute;
    top: 0;
    left: -100px;
    width: 200px;
    height: 100%;
    background: radial-gradient(circle, rgba(251, 192, 45, 0.15) 0%, transparent 60%);
    pointer-events: none;
    animation: searchLightMove 5s infinite ease-in-out;
}

.search-result-content {
    display: flex;
    flex-direction: column;
    gap: 4px;
    width: 80%;
}

.search-result-title {
    font-size: 0.72rem;
    font-weight: bold;
    color: var(--ink-dark);
}

.search-result-meta {
    font-size: 0.6rem;
    color: var(--ink-muted);
}

.search-star-icon {
    width: 20px;
    height: 20px;
    color: var(--accent-gold);
    animation: starredPulse 2s infinite alternate ease-in-out;
}

/* 探照灯移动动画 */
@keyframes searchLightMove {
    0% { left: -100px; }
    50% { left: 100%; }
    100% { left: -100px; }
}

@keyframes starredPulse {
    0% { transform: scale(0.9); filter: drop-shadow(0 0 0px var(--accent-gold)); }
    100% { transform: scale(1.15); filter: drop-shadow(0 0 6px rgba(251, 192, 45, 0.4)); }
}

/* --- 特性亮点二展架：干净阅读界面预览 --- */
.font-sandbox-wrap {
    width: 90%;
    height: 85%;
    display: flex;
    flex-direction: column;
    padding: 12px;
}

.sandbox-preview-container {
    flex: 1;
    background: #fff;
    border: 1px solid var(--ink-divider);
    border-radius: var(--radius-sm);
    padding: 14px;
    overflow-y: auto;
    max-height: 200px;
    font-size: 0.85rem;
    line-height: 1.75;
}

.sandbox-preview-title {
    font-weight: 800;
    margin-bottom: 8px;
    border-bottom: 1px solid var(--ink-divider);
    padding-bottom: 4px;
}

/* ----- 9. 极客重器：多源同步协议与无感空后台静默刷新 (Tech & Sync) ----- */
.tech-section {
    padding: 100px 0;
    background: linear-gradient(180deg, var(--bg-warm) 0%, rgba(228, 227, 224, 0.3) 100%);
    border-bottom: 1px solid var(--ink-divider);
}

.tech-grid {
    display: flex;
    align-items: center;
    gap: 64px;
    margin-top: 40px;
}

@media (max-width: 900px) {
    .tech-grid {
        flex-direction: column-reverse;
        gap: 40px;
    }
}

.tech-illustration {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* 用 CSS / SVG 画一个多账户同步与协议接收抽象图，体现顺畅的网络聚合 */
.sync-svg-box {
    width: 320px;
    height: 320px;
    background: var(--bg-card);
    border: 2px solid var(--ink-dark);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-paper);
    position: relative;
    overflow: hidden;
}

.sync-svg-box .tech-core {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 70px;
    height: 70px;
    border: 2px solid var(--ink-dark);
    background-color: var(--bg-warm);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    animation: pulseCore 3s infinite ease-in-out;
    z-index: 2;
}

@keyframes pulseCore {
    0%, 100% { transform: translate(-50%, -50%) scale(1); box-shadow: 0 0 0 0 rgba(129, 199, 132, 0.2); }
    50% { transform: translate(-50%, -50%) scale(1.08); box-shadow: 0 0 20px 10px rgba(129, 199, 132, 0.15); }
}

.sync-svg-box .sync-network-line {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 100px;
    height: 1.5px;
    background: repeating-linear-gradient(90deg, var(--ink-muted), var(--ink-muted) 4px, transparent 4px, transparent 8px);
    transform-origin: left center;
}

.sync-svg-box .sync-network-line.l1 { transform: translate(-50%, -50%) rotate(30deg) scaleX(1.1); }
.sync-svg-box .sync-network-line.l2 { transform: translate(-50%, -50%) rotate(150deg) scaleX(1.1); }
.sync-svg-box .sync-network-line.l3 { transform: translate(-50%, -50%) rotate(270deg) scaleX(1.1); }

.sync-svg-box .sync-node {
    position: absolute;
    width: 48px;
    height: 48px;
    background: #fff;
    border: 2px solid var(--ink-dark);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 0.68rem;
    font-weight: 700;
}

.sync-svg-box .sync-node.n1 { top: 15%; left: 70%; animation: nodeSyncBlink1 4s infinite ease-in-out; }
.sync-svg-box .sync-node.n2 { top: 15%; left: 15%; animation: nodeSyncBlink2 4s infinite ease-in-out; }
.sync-svg-box .sync-node.n3 { top: 70%; left: 42%; animation: nodeSyncBlink3 4s infinite ease-in-out; }

/* 漫射脉冲粒子数据流动动画 */
.sync-svg-box .sync-data-pulse {
    position: absolute;
    width: 8px;
    height: 8px;
    background-color: var(--accent-green);
    border-radius: 50%;
}

.sync-svg-box .sync-data-pulse.p1 { animation: pulseFlow1 4s infinite linear; }
.sync-svg-box .sync-data-pulse.p2 { animation: pulseFlow2 4s infinite linear; }
.sync-svg-box .sync-data-pulse.p3 { animation: pulseFlow3 4s infinite linear; }

@keyframes nodeSyncBlink1 {
    0%, 100% { border-color: var(--ink-dark); background-color: #fff; }
    50% { border-color: var(--accent-green); background-color: rgba(129, 199, 132, 0.1); }
}
@keyframes nodeSyncBlink2 {
    0%, 100% { border-color: var(--ink-dark); background-color: #fff; }
    33% { border-color: var(--accent-green); background-color: rgba(129, 199, 132, 0.1); }
}
@keyframes nodeSyncBlink3 {
    0%, 100% { border-color: var(--ink-dark); background-color: #fff; }
    66% { border-color: var(--accent-green); background-color: rgba(129, 199, 132, 0.1); }
}

@keyframes pulseFlow1 {
    0% { top: 22%; left: 74%; opacity: 0; }
    10% { opacity: 1; }
    50%, 100% { top: 48%; left: 50%; opacity: 0; }
}

@keyframes pulseFlow2 {
    0%, 33% { top: 22%; left: 20%; opacity: 0; }
    43% { opacity: 1; }
    83%, 100% { top: 48%; left: 50%; opacity: 0; }
}

@keyframes pulseFlow3 {
    0%, 66% { top: 72%; left: 46%; opacity: 0; }
    76% { opacity: 1; }
    100% { top: 52%; left: 50%; opacity: 0; }
}

.tech-content {
    flex: 1.2;
}

.tech-keywords {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 24px;
}

.tech-tag {
    background: var(--bg-card);
    border: 1px solid var(--ink-divider);
    padding: 6px 14px;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--ink-medium);
}

/* ----- 10. 产品故事故事与匠心理念 (Story) ----- */
.story-section {
    padding: 100px 0;
    background: var(--bg-card);
    text-align: center;
}

.story-quote-box {
    max-width: 720px;
    margin: 0 auto;
    position: relative;
    z-index: 10;
}

.story-quote-box blockquote {
    font-family: var(--font-serif);
    font-size: 1.45rem;
    line-height: 1.9;
    color: var(--ink-dark);
    margin-bottom: 24px;
    position: relative;
}

.story-quote-box blockquote::before {
    content: '“';
    position: absolute;
    top: -30px;
    left: -20px;
    font-size: 4rem;
    color: var(--ink-divider);
    font-family: var(--font-serif);
}

.story-quote-box p.story-author {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--ink-muted);
}

/* ----- 11. 行动呼吁与全套下载 (CTA) ----- */
.cta-section {
    padding: 120px 0;
    background: var(--ink-dark);
    color: var(--bg-warm);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-section h2 {
    font-size: 2.75rem;
    font-weight: 850;
    margin-bottom: 16px;
    color: inherit;
    line-height: 1.2;
}

.cta-desc {
    color: var(--ink-muted);
    font-size: 1.05rem;
    margin-bottom: 40px;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

.cta-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.cta-btn-primary {
    background: var(--bg-warm);
    color: var(--ink-dark);
    border: 2px solid var(--bg-warm);
}

.cta-btn-primary:hover {
    background: transparent;
    color: var(--bg-warm);
}

.cta-btn-secondary {
    border: 2px solid rgba(247, 246, 244, 0.3);
    color: var(--bg-warm);
}

.cta-btn-secondary:hover {
    border-color: var(--bg-warm);
}

/* ----- 12. 页脚 ----- */
.footer {
    background: var(--bg-warm);
    border-top: 1px solid var(--ink-divider);
    padding: 40px 0;
    text-align: center;
    font-size: 0.85rem;
    color: var(--ink-muted);
}

.footer-nav {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 16px;
}

.footer-nav a:hover {
    color: var(--ink-dark);
    text-decoration: underline;
}

/* ----- 13. 滚动渐显动画支持 (JS IntersectionObserver triggers) ----- */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}