/* =============================================================
 * 渝乐盟 · 巴渝修仙宗门 · 主样式 (style.css)
 * 主题：取自 hero-background.png 的「云海青空」配色
 * 基调：雾蓝 + 天青 + 深黛 + 金箔点缀
 * ============================================================= */

/* -------------------- 1. 宗门令牌 (CSS变量) -------------------- */
:root {
    /* 深黛（墨色替代，取自图片深蓝调） */
    --ink-black: #2c4a63;
    /* 云纸（浅蓝灰背景，取自图片天空） */
    --scroll-bg: #e8f0f8;
    /* 金箔（暖色点缀，保留宗门印章感） */
    --gold: #d4af37;
    --gold-light: #f0dfa0;
    /* 朱红（印章色，保留） */
    --vermilion: #b31b1b;
    /* 天青（主强调色，取自图片 #78a8d8） */
    --jade-green: #4a7fb5;
    /* 雾蓝（次级强调，取自图片 #a8c0d8） */
    --mist-blue: #a8c0d8;
    /* 深黛文字 */
    --paper: #eef4fa;
    --deep-text: #1f3a4d;
    --font-serif: 'STKaiti', 'KaiTi', 'Noto Serif SC', serif;
    --shadow-gold: 0 4px 20px rgba(212, 175, 55, 0.3);
    --shadow-blue: 0 8px 30px rgba(74, 127, 181, 0.25);
}

/* -------------------- 2. 重置与根基 -------------------- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--scroll-bg);
    color: var(--deep-text);
    font-family: var(--font-serif);
    overflow-x: hidden;
}

/* 自定义滚动条 - 古风卷轴感 */
::-webkit-scrollbar {
    width: 8px;
    background: var(--scroll-bg);
}
::-webkit-scrollbar-thumb {
    background: var(--jade-green);
    border-radius: 4px;
    border: 1px solid var(--scroll-bg);
}

/* -------------------- 3. 通用组件 -------------------- */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* 古风分隔符 */
.section-divider {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1.5rem;
    margin: 2rem 0;
    color: var(--jade-green);
    font-size: 1.2rem;
    letter-spacing: 0.5rem;
    opacity: 0.6;
}
.section-divider::before,
.section-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--jade-green), transparent);
}

/* 章印效果 */
.seal {
    display: inline-block;
    border: 3px solid var(--vermilion);
    color: var(--vermilion);
    padding: 0.2rem 0.8rem;
    font-size: 0.8rem;
    transform: rotate(-5deg);
    letter-spacing: 2px;
    font-weight: bold;
    background: rgba(179, 27, 27, 0.08);
    border-radius: 4px 8px 4px 8px;
    margin-left: 0.5rem;
}

/* -------------------- 4. 头部导航 (山门接引) -------------------- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 1rem 2rem;
    background: rgba(44, 74, 99, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(212, 175, 55, 0.3);
    z-index: 999;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.3s ease;
}

.navbar .brand {
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
    text-decoration: none;
    color: var(--gold-light);
}
.navbar .brand h1 {
    font-size: 1.8rem;
    font-weight: normal;
    letter-spacing: 6px;
    text-shadow: 0 0 15px rgba(212, 175, 55, 0.3);
}
.navbar .brand small {
    font-size: 0.8rem;
    color: var(--paper);
    opacity: 0.7;
    letter-spacing: 2px;
}
.navbar .brand .seal {
    border-color: var(--gold);
    color: var(--gold);
    background: rgba(212, 175, 55, 0.12);
}

.nav-links {
    display: flex;
    gap: 2.5rem;
    list-style: none;
    font-size: 1.1rem;
}
.nav-links a {
    color: var(--paper);
    text-decoration: none;
    letter-spacing: 2px;
    transition: 0.3s;
    position: relative;
    padding-bottom: 4px;
}
.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gold);
    transition: 0.3s;
}
.nav-links a:hover {
    color: var(--gold-light);
}
.nav-links a:hover::after {
    width: 100%;
}

/* 移动端汉堡按钮 */
.nav-toggle {
    display: none;
    background: transparent;
    border: 1px solid var(--gold);
    color: var(--gold);
    font-size: 1.2rem;
    padding: 0.4rem 0.8rem;
    border-radius: 4px;
    cursor: pointer;
}

/* -------------------- 5. 英雄区域 (宗门正殿) -------------------- */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 6rem 2rem 4rem;
    position: relative;
    z-index: 0;
    isolation: isolate;
    /* 云海青空背景图 */
    background-image: url('/assets/hero-background.png');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    border-bottom: 2px solid var(--gold);
    overflow: hidden;
}

/* 深黛半透明遮罩，保证文字可读性 */
.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(
        180deg,
        rgba(44, 74, 99, 0.55) 0%,
        rgba(44, 74, 99, 0.35) 45%,
        rgba(44, 74, 99, 0.6) 100%
    );
    z-index: 0;
}

/* 墨迹粒子画布 */
.particle-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
}

/* 仙鹤画布（远景） */
.crane-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
}

.hero > *:not(canvas) {
    position: relative;
    z-index: 2;
}

.hero .sect-name {
    font-size: 1.2rem;
    color: var(--gold-light);
    letter-spacing: 12px;
    margin-bottom: 1rem;
    opacity: 0.9;
    border: 1px solid var(--gold);
    padding: 0.3rem 2rem;
    border-radius: 2px;
    background: rgba(44, 74, 99, 0.35);
}

.hero h2 {
    font-size: clamp(3.5rem, 12vw, 7rem);
    font-weight: normal;
    letter-spacing: 16px;
    color: #ffffff;
    text-shadow: 0 2px 20px rgba(44, 74, 99, 0.6);
    line-height: 1.2;
    margin-bottom: 1.5rem;
    position: relative;
}
.hero h2 small {
    font-size: 1.8rem;
    display: block;
    letter-spacing: 8px;
    color: var(--gold-light);
    opacity: 0.9;
    margin-top: 0.5rem;
    font-weight: normal;
    text-shadow: 0 1px 10px rgba(44, 74, 99, 0.5);
}

.hero .desc {
    font-size: 1.3rem;
    max-width: 700px;
    color: #ffffff;
    letter-spacing: 4px;
    line-height: 2;
    margin-bottom: 3rem;
    border-left: 3px solid var(--gold);
    padding-left: 2rem;
    text-align: left;
    text-shadow: 0 1px 8px rgba(44, 74, 99, 0.7);
}
.hero .desc strong {
    color: var(--gold-light);
}

.hero .btn-group {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
    justify-content: center;
}
.btn {
    padding: 0.8rem 2.8rem;
    border: 1px solid var(--gold);
    background: transparent;
    color: #ffffff;
    font-family: var(--font-serif);
    font-size: 1.1rem;
    letter-spacing: 4px;
    cursor: pointer;
    transition: 0.4s;
    text-decoration: none;
    position: relative;
    overflow: hidden;
    text-shadow: 0 1px 6px rgba(44, 74, 99, 0.6);
}
.btn-primary {
    background: var(--gold);
    color: var(--ink-black);
    font-weight: bold;
    text-shadow: none;
}
.btn-primary:hover {
    background: transparent;
    color: #ffffff;
    box-shadow: var(--shadow-gold);
}
.btn-outline:hover {
    background: var(--gold);
    color: var(--ink-black);
    box-shadow: var(--shadow-gold);
}

/* -------------------- 6. 三峰介绍 (分支机构) -------------------- */
.peaks {
    padding: 6rem 0;
    background: var(--scroll-bg);
    color: var(--deep-text);
}
.peaks .section-title {
    text-align: center;
    font-size: 2.8rem;
    letter-spacing: 12px;
    color: var(--ink-black);
    border-bottom: 2px solid var(--gold);
    display: inline-block;
    padding-bottom: 0.5rem;
    margin-bottom: 3rem;
}
.peak-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.5rem;
}
.peak-card {
    display: block;
    background: #ffffff;
    padding: 2.5rem 2rem;
    border-radius: 8px 24px 8px 24px;
    box-shadow: 0 10px 30px rgba(44, 74, 99, 0.12);
    border-left: 6px solid var(--jade-green);
    transition: 0.4s;
    position: relative;
    text-decoration: none;
    color: inherit;
}
.peak-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-blue);
    border-left-color: var(--ink-black);
}
.peak-card:hover .icon {
    transform: scale(1.15) rotate(-6deg);
    color: var(--gold);
}
.peak-card:hover h3 {
    color: var(--jade-green);
}
.peak-card .icon {
    font-size: 2.5rem;
    color: var(--jade-green);
    margin-bottom: 1rem;
    display: inline-block;
    transition: 0.4s;
}
.peak-card h3 {
    font-size: 1.8rem;
    letter-spacing: 4px;
    margin-bottom: 0.2rem;
    color: var(--ink-black);
    transition: 0.4s;
}
.peak-card .eng {
    font-size: 0.9rem;
    color: #7a93ab;
    letter-spacing: 2px;
    margin-bottom: 1rem;
    display: block;
}
.peak-card p {
    line-height: 1.8;
    color: #4a5f72;
    margin-bottom: 1.2rem;
}
.peak-card .tag {
    display: inline-block;
    background: var(--ink-black);
    color: var(--gold-light);
    padding: 0.2rem 1rem;
    font-size: 0.8rem;
    border-radius: 20px;
    letter-spacing: 1px;
}

/* -------------------- 7. 法宝库 (产品) -------------------- */
.treasures {
    padding: 6rem 0;
    background: var(--ink-black);
    border-top: 1px solid rgba(212, 175, 55, 0.3);
}
.treasure-title {
    color: var(--gold-light);
    font-size: 2.8rem;
    letter-spacing: 12px;
}
.treasure-list {
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
}
.treasure-item {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    border: 1px solid rgba(212, 175, 55, 0.2);
    transition: 0.3s;
    align-items: center;
}
.treasure-item:hover {
    border-color: var(--gold);
    background: rgba(212, 175, 55, 0.08);
}
.treasure-icon {
    font-size: 3rem;
    width: 80px;
    text-align: center;
    color: var(--gold);
}
.treasure-info {
    flex: 1;
}
.treasure-info h4 {
    font-size: 1.8rem;
    color: var(--gold-light);
    letter-spacing: 4px;
}
.treasure-info h4 span {
    font-size: 1rem;
    color: var(--paper);
    opacity: 0.5;
    margin-left: 1rem;
    font-weight: normal;
}
.treasure-info p {
    color: #b8c7d6;
    line-height: 1.8;
    margin-top: 0.5rem;
}
.treasure-info .repo-link {
    color: var(--gold);
    text-decoration: none;
    border-bottom: 1px dashed var(--gold);
    margin-right: 1rem;
}
.treasure-badge {
    padding: 0.3rem 1.2rem;
    border-radius: 20px;
    font-size: 0.8rem;
    background: var(--gold);
    color: var(--ink-black);
    letter-spacing: 2px;
}
.treasure-badge.open {
    background: var(--jade-green);
}

/* -------------------- 8. 投帖 (联系/Footer) -------------------- */
.contact {
    padding: 4rem 0;
    background: var(--scroll-bg);
    color: var(--deep-text);
    text-align: center;
}
.contact .seal {
    transform: rotate(0deg);
    font-size: 1.2rem;
    padding: 0.5rem 2rem;
}
.contact p {
    margin: 1.5rem 0;
    font-size: 1.2rem;
    letter-spacing: 2px;
}
.contact .email {
    font-size: 1.6rem;
    color: var(--vermilion);
    text-decoration: none;
    border-bottom: 2px solid var(--gold);
    padding-bottom: 0.3rem;
}
.footer-bar {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(44, 74, 99, 0.2);
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    font-size: 0.9rem;
    color: #5a7186;
}
.footer-bar a {
    color: var(--deep-text);
}

/* -------------------- 9. 移动端适配 -------------------- */
@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        gap: 0.5rem;
        padding: 0.8rem;
        align-items: flex-start;
    }
    .nav-toggle {
        display: block;
        position: absolute;
        top: 1rem;
        right: 1rem;
    }
    .nav-links {
        gap: 1rem;
        font-size: 0.9rem;
        flex-wrap: wrap;
        justify-content: center;
        width: 100%;
        display: none;
    }
    .nav-links.open {
        display: flex;
        flex-direction: column;
        gap: 0.8rem;
        margin-top: 0.5rem;
    }
    .hero {
        background-attachment: scroll;
    }
    .hero .desc {
        text-align: center;
        border-left: none;
        padding-left: 0;
        border-top: 2px solid var(--gold);
        padding-top: 1rem;
    }
    .treasure-item {
        flex-direction: column;
        text-align: center;
    }
    .footer-bar {
        flex-direction: column;
        gap: 0.5rem;
        text-align: center;
    }
}