/* 全局样式 */
:root {
    --primary-color: #F57F1B;
    --dark-bg: #121110;
    --light-text: #e0d6cc;
    --card-bg: #1a1a1a;
    --accent-text: #c28540;
    --prominent-bg: #252220;
    --secondary-color: #c28540;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--dark-bg);
    color: var(--light-text);
    line-height: 1.6;
}

h1,
h2,
h3 {
    color: var(--accent-text);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 英雄区域 */
.hero {
    background-color: var(--prominent-bg);
    padding: 80px 20px;
}

.hero-shell {
    display: block;
}

.hero-copy {
    grid-column: 1 / -1;
    width: 100%;
    text-align: center;
    max-width: 100%;
    margin: 0 auto;
    padding-top: 6px;
}

.hero-kicker {
    display: inline-block;
    margin-bottom: 14px;
    padding: 6px 12px;
    border-radius: 999px;
    background: rgba(194, 133, 64, 0.12);
    color: #d3b08a;
    border: 1px solid rgba(194, 133, 64, 0.22);
    font-size: 0.92rem;
    letter-spacing: 0.06em;
}

.hero h1 {
    font-size: 3.2rem;
    margin-bottom: 16px;
}

.hero p {
    font-size: 1.08rem;
    margin-bottom: 18px;
    color: var(--light-text);
}

.button {
    display: inline-block;
    background-color: var(--primary-color) !important;
    color: #fff;
    padding: 10px 30px;
    text-decoration: none;
    border-radius: 5px;
    font-size: 1.1rem;
    transition: background-color 0.3s ease;
}

.button:hover {
    background-color: #D86D10 !important;
}

/* 功能介绍 */
#features {
    padding: 72px 0 88px;
}

.section-heading {
    text-align: center;
    max-width: 900px;
    margin: 0 auto 44px;
}

.section-kicker {
    display: inline-block;
    margin-bottom: 12px;
    padding: 6px 12px;
    border-radius: 999px;
    background: rgba(194, 133, 64, 0.12);
    color: #d3b08a;
    border: 1px solid rgba(194, 133, 64, 0.22);
    font-size: 0.9rem;
    letter-spacing: 0.08em;
}

.section-heading h2 {
    font-size: 2.6rem;
    margin-bottom: 16px;
}

.section-heading p {
    font-size: 1.08rem;
    color: #cbb9a9;
}

.feature {
    display: flex;
    align-items: center;
    gap: 32px;
    background-color: var(--card-bg);
    padding: 28px;
    border-radius: 18px;
    border: 1px solid rgba(194, 133, 64, 0.18);
    box-shadow: 0 18px 45px rgba(0, 0, 0, 0.22);
}

.feature + .feature {
    margin-top: 28px;
}

.feature-hero {
    margin-bottom: 28px;
    background: linear-gradient(135deg, rgba(37, 34, 32, 0.98), rgba(28, 24, 21, 0.98));
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px;
}

.feature-card {
    flex-direction: column;
    align-items: stretch;
    height: 100%;
}

.feature-card-wide {
    grid-column: span 2;
    flex-direction: row;
}

.feature-image {
    flex: 1 1 0;
}

.feature-image img {
    width: 100%;
    height: 100%;
    max-height: 380px;
    display: block;
    border-radius: 14px;
    background-color: #333;
    object-fit: cover;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.feature-text {
    flex: 1;
}

.feature-label {
    display: inline-block;
    margin-bottom: 12px;
    color: #b9956d;
    font-size: 0.88rem;
    letter-spacing: 0.08em;
}

.feature-text h3 {
    font-size: 1.75rem;
    line-height: 1.3;
    margin-bottom: 12px;
}

.feature-text p {
    color: var(--light-text);
    font-size: 1rem;
}

.feature-hero .feature-text p {
    font-size: 1.08rem;
}

/* 下载区域 */
.download-section {
    text-align: center;
    padding: 60px 20px;
    background-color: var(--prominent-bg);
    border-radius: 8px;
    margin-bottom: 60px;
}

.download-section h2 {
    font-size: 2.2rem;
    margin-bottom: 10px;
}

.download-section p {
    margin-bottom: 30px;
    color: var(--light-text);
}

/* Tooltip样式 */
.tooltip {
    position: relative;
    display: inline-block;
}

.tooltip .tooltiptext {
    visibility: hidden;
    width: 220px;
    background-color: var(--primary-color); /* 使用网站主色调 */
    color: #fff;
    text-align: center;
    border-radius: 6px;
    padding: 12px;
    position: absolute;
    z-index: 100;
    bottom: 125%;
    left: 50%;
    transform: translateX(-50%);
    opacity: 0;
    transition: none; /* 移除过渡效果，立即显示 */
    font-size: 1rem;
    font-weight: bold;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.3);
    border: 1px solid var(--secondary-color);
    letter-spacing: 0.3px;
}

.tooltip .tooltiptext::after {
    content: "";
    position: absolute;
    top: 100%;
    left: 50%;
    margin-left: -8px;
    border-width: 8px;
    border-style: solid;
    border-color: var(--primary-color) transparent transparent transparent;
}

.tooltip:hover .tooltiptext {
    visibility: visible;
    opacity: 1;
    animation: subtle-pulse 2s infinite alternate;
    animation-delay: 0s;
}

@keyframes subtle-pulse {
    0% {
        transform: translateX(-50%) scale(1);
        box-shadow: 0 0 5px rgba(0, 0, 0, 0.3);
    }
    100% {
        transform: translateX(-50%) scale(1.02);
        box-shadow: 0 0 8px rgba(0, 0, 0, 0.4);
    }
}

/* 页脚 */
footer {
    text-align: center;
    padding: 20px 0;
    border-top: 1px solid #333;
}

/* 备案信息样式 */
.beian {
    margin-top: 8px;
    color: var(--light-text);
    font-size: 12px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.beian a {
    color: var(--light-text);
    text-decoration: none;
}

.beian a:visited {
    color: var(--light-text);
    text-decoration: none;
}

.beian a:hover {
    color: var(--accent-text);
    text-decoration: none;
}

.beian .sep {
    color: #555;
}

.hero-logo-placeholder {
    width: 120px;
    height: 120px;
    margin: 0 auto 20px;
    background-color: #333;
    background-image: url('images/logo-big.png');
    background-size: contain;
    background-position: center;
    background-repeat: no-repeat;
    border-radius: 50%;
}

.hero-showcase {
    position: relative;
    flex: 1.45;
    background: linear-gradient(180deg, rgba(0, 0, 0, 0.18), rgba(0, 0, 0, 0.28));
    border: 1px solid rgba(194, 133, 64, 0.18);
    border-radius: 22px;
    padding: 16px 16px 18px;
    box-shadow: 0 24px 50px rgba(0, 0, 0, 0.28);
}

.hero-stage {
    display: grid;
    grid-template-columns: minmax(280px, 0.55fr) minmax(0, 1.45fr);
    gap: 28px;
    align-items: stretch;
}

.hero-feature-list {
    position: relative;
    min-height: 100%;
    background: linear-gradient(180deg, rgba(24, 21, 19, 0.96), rgba(18, 16, 14, 0.96));
    border: 1px solid rgba(194, 133, 64, 0.18);
    border-radius: 22px;
    padding: 28px 24px;
    box-shadow: 0 24px 50px rgba(0, 0, 0, 0.22);
    overflow: hidden;
}

.hero-feature {
    position: absolute;
    inset: 0;
    padding: 28px 24px;
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.45s ease, transform 0.45s ease;
    pointer-events: none;
    text-align: left;
}

.hero-feature.active {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.hero-feature-index {
    display: inline-flex;
    width: 44px;
    height: 44px;
    align-items: center;
    justify-content: center;
    margin-bottom: 18px;
    border-radius: 14px;
    background: rgba(245, 127, 27, 0.14);
    color: #f3bf84;
    font-weight: 700;
    font-size: 1rem;
}

.hero-feature h3 {
    margin-bottom: 14px;
    font-size: 1.8rem;
    line-height: 1.25;
}

.hero-feature p {
    margin: 0;
    color: #ccb8a2;
    font-size: 1rem;
    line-height: 1.85;
}

.hero-slides {
    position: relative;
    aspect-ratio: 1259 / 767;
}

.hero-slide {
    position: absolute;
    inset: 0;
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.45s ease, transform 0.45s ease;
    pointer-events: none;
}

.hero-slide.active {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.hero-slide img {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: contain;
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    background: #211d1a;
}

.hero-slide-caption {
    display: flex;
    flex-direction: column;
    gap: 4px;
    margin-top: 14px;
    text-align: left;
}

.hero-slide-caption strong {
    color: #ead2b4;
    font-size: 1.08rem;
}

.hero-slide-caption span {
    color: #bca894;
    font-size: 0.96rem;
}

.hero-dots {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 18px;
}

.hero-dot {
    width: 10px;
    height: 10px;
    border-radius: 999px;
    border: none;
    background: rgba(255, 255, 255, 0.18);
    cursor: pointer;
    transition: transform 0.2s ease, background-color 0.2s ease;
}

.hero-dot.active {
    background: var(--primary-color);
    transform: scale(1.15);
}

.download-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.button-secondary {
    background-color: var(--secondary-color) !important;
}

.button-secondary:hover {
    background-color: #a06d30 !important;
    /* Darken(var(--secondary-color)) */
}

/* KOOK 社区按钮（英雄区专用） */
.button.button-kook {
    background-color: #7acc35 !important;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.button.button-kook:hover {
    background-color: #69b52d !important;
}

/* 按钮图标通用样式（当前用于 KOOK 按钮） */
.button.button-kook .icon {
    width: 18px;
    height: 18px;
    display: inline-block;
}

/* 英雄区域按钮组 */
.hero-buttons {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
}

.button-container {
    position: relative;
}

.qr-code-popup {
    display: none;
    position: absolute;
    top: 115%; /* 稍微增加与按钮的距离 */
    left: 50%;
    transform: translateX(-50%);
    background-color: #fff;
    padding: 15px;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    width: 180px;
    text-align: center;
    z-index: 10;
}

.qr-code-popup img {
    width: 150px;
    height: 150px;
    display: block;
    margin: 0 auto 10px;
}

.qr-code-popup p {
    color: #333;
    font-size: 0.9rem;
    margin: 0;
}

.button-container:hover .qr-code-popup {
    display: block;
}

/* 顶栏导航 */
.top-nav {
    background-color: var(--prominent-bg);
    padding: 10px 0;
    border-bottom: 1px solid #333;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo img {
    height: 40px;
    display: block;
}

.nav-links {
    display: flex;
    gap: 30px;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-links a {
    color: var(--light-text);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

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

.nav-button {
    padding: 5px 20px;
    font-size: 0.9rem;
}

.nav-left-group {
    display: flex;
    align-items: center;
    gap: 30px;
}

@media (max-width: 960px) {
    .hero-stage {
        grid-template-columns: 1fr;
    }

    .hero-copy {
        grid-column: auto;
    }

    .hero-feature-list {
        min-height: 220px;
    }

    .hero-logo-placeholder {
        margin: 0 auto 20px;
    }

    .section-heading h2 {
        font-size: 2.1rem;
    }

    .feature,
    .feature-card-wide {
        flex-direction: column;
    }

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

    .feature-card-wide {
        grid-column: span 1;
    }
}

@media (max-width: 640px) {
    .hero {
        padding: 64px 18px;
    }

    .hero h1 {
        font-size: 2.2rem;
    }

    .hero-feature h3 {
        font-size: 1.5rem;
    }

    .hero p,
    .section-heading p,
    .feature-hero .feature-text p,
    .feature-text p {
        font-size: 1rem;
    }

    #features {
        padding: 56px 0 72px;
    }

    .feature {
        padding: 20px;
        border-radius: 14px;
    }

    .feature-text h3 {
        font-size: 1.42rem;
    }
}