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

:root {
    --bg: #080c17;
    --panel: rgba(255, 255, 255, .045);
    --panel-hi: rgba(255, 255, 255, .08);
    --line: rgba(230, 192, 104, .22);
    --gold: #e6c068;
    --gold-soft: #f4e0a8;
    --blue: #6ea8fe;
    --text: #e9ecf5;
    --muted: #96a0b8;
}

html {
    scroll-behavior: smooth;
}

body {
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", sans-serif;
    line-height: 1.8;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

::selection {
    background: rgba(230, 192, 104, .3);
    color: #fff;
}

/* ===== 背景 ===== */
#stars {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

.glow {
    position: fixed;
    border-radius: 50%;
    filter: blur(90px);
    opacity: .35;
    z-index: 0;
    pointer-events: none;
}

.glow.g1 {
    width: 520px;
    height: 520px;
    background: #1b3a7a;
    top: -180px;
    left: -160px;
}

.glow.g2 {
    width: 460px;
    height: 460px;
    background: #5a3d1a;
    bottom: -160px;
    right: -140px;
}

.glow.g3 {
    width: 380px;
    height: 380px;
    background: #123f45;
    top: 45%;
    left: 60%;
    opacity: .25;
}

.wrap {
    position: relative;
    z-index: 2;
}

/* ===== 顶部进度条 ===== */
#progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 2px;
    width: 0;
    background: linear-gradient(90deg, var(--gold), var(--blue));
    z-index: 99;
    transition: width .1s linear;
    box-shadow: 0 0 12px rgba(230, 192, 104, .7);
}

/* ===== 顶部导航 ===== */
.topbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 60;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 14px 28px;
    background: rgba(8, 12, 23, .62);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid rgba(255, 255, 255, .05);
}

.back {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 13.5px;
    letter-spacing: .1em;
    color: var(--gold);
    text-decoration: none;
    padding: 7px 16px;
    border-radius: 100px;
    border: 1px solid var(--line);
    background: rgba(230, 192, 104, .05);
    transition: .35s;
}

.back:hover {
    background: var(--gold);
    color: #151006;
    transform: translateX(-3px);
}

.nav-tag {
    font-size: 12px;
    letter-spacing: .35em;
    color: var(--muted);
}

.topbar-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-left: auto;
}

@media (max-width:600px) {
    .topbar {
        padding: 12px 16px;
    }

    .nav-tag {
        display: none;
    }
}

/* ===== 通用 ===== */
.container {
    max-width: 820px;
    margin: 0 auto;
    padding: 0 24px;
}

.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity .9s cubic-bezier(.2, .7, .2, 1), transform .9s cubic-bezier(.2, .7, .2, 1);
}

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

/* ===== 文章头部 ===== */
.post-head {
    padding: 150px 0 46px;
    text-align: center;
    position: relative;
}

.post-date {
    display: inline-block;
    font-size: 12px;
    letter-spacing: .4em;
    color: var(--gold);
    margin-bottom: 22px;
    padding: 8px 22px;
    border-radius: 100px;
    border: 1px solid var(--line);
    background: rgba(230, 192, 104, .05);
    animation: fadeDown 1s .05s both;
}

.post-head h1 {
    font-size: clamp(30px, 6.2vw, 52px);
    font-weight: 800;
    letter-spacing: .05em;
    line-height: 1.25;
    background: linear-gradient(180deg, #fff 10%, #e8d9a8 60%, #9c7c2e 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    animation: fadeDown 1.1s .18s both;
    filter: drop-shadow(0 8px 34px rgba(230, 192, 104, .2));
}

.post-sub {
    margin-top: 20px;
    font-size: clamp(14px, 2vw, 16.5px);
    color: var(--muted);
    letter-spacing: .1em;
    animation: fadeDown 1.1s .34s both;
}

.post-meta {
    margin-top: 28px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 14px;
    flex-wrap: wrap;
    font-size: 12.5px;
    letter-spacing: .14em;
    color: #66708a;
    animation: fadeDown 1.1s .5s both;
}

.post-meta i {
    font-style: normal;
    color: rgba(230, 192, 104, .5);
}

.head-line {
    width: 1px;
    height: 64px;
    margin: 46px auto 0;
    background: linear-gradient(180deg, transparent, var(--gold));
    animation: fadeDown 1.3s .62s both;
}

.head-line::after {
    content: '';
    display: block;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--gold);
    margin: 0 auto;
    transform: translateY(-2px);
    animation: pulse 2s infinite;
}

@keyframes fadeDown {
    from {
        opacity: 0;
        transform: translateY(-16px)
    }

    to {
        opacity: 1;
        transform: none
    }
}

@keyframes pulse {

    0%,
    100% {
        opacity: .4;
        transform: translateY(-2px) scale(1)
    }

    50% {
        opacity: 1;
        transform: translateY(-2px) scale(1.6)
    }
}

/* ===== 封面图 ===== */
.cover {
    margin: 0 auto 56px;
    max-width: 980px;
    padding: 0 24px;
}

.cover .ph {
    aspect-ratio: 21/9;
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, .07);
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(150deg, rgba(230, 192, 104, .1), rgba(110, 168, 254, .06) 55%, rgba(255, 255, 255, .015));
    color: var(--muted);
    font-size: 13px;
    letter-spacing: .2em;
    position: relative;
    overflow: hidden;
}

.cover .ph::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 50% 130%, rgba(230, 192, 104, .16), transparent 60%);
}

/* ===== 正文 ===== */
.post-body {
    padding-bottom: 20px;
}

.post-body p {
    font-size: 16.5px;
    line-height: 2.05;
    color: #c3cad9;
    margin-bottom: 22px;
}

.post-body h2 {
    font-size: clamp(19px, 3vw, 23px);
    font-weight: 700;
    letter-spacing: .04em;
    margin: 52px 0 18px;
    padding-left: 18px;
    position: relative;
}

.post-body h2::before {
    content: '';
    position: absolute;
    left: 0;
    top: .42em;
    bottom: .28em;
    width: 3px;
    border-radius: 3px;
    background: linear-gradient(180deg, var(--gold), rgba(230, 192, 104, .12));
}

.post-body strong {
    color: var(--gold-soft);
    font-weight: 700;
}

.post-body blockquote {
    margin: 30px 0;
    padding: 20px 26px;
    background: var(--panel);
    border-left: 2px solid var(--gold);
    border-radius: 0 16px 16px 0;
    color: var(--gold-soft);
    font-size: 15.5px;
    line-height: 1.95;
    position: relative;
}

.post-body blockquote::before {
    content: '“';
    position: absolute;
    right: 18px;
    top: -6px;
    font-size: 56px;
    color: rgba(230, 192, 104, .14);
    font-family: Georgia, serif;
    line-height: 1;
}

.post-body ul {
    margin: 22px 0 26px;
    padding-left: 4px;
    list-style: none;
}

.post-body li {
    font-size: 16px;
    color: #c3cad9;
    line-height: 1.95;
    padding-left: 24px;
    position: relative;
    margin-bottom: 10px;
}

.post-body li::before {
    content: '';
    position: absolute;
    left: 4px;
    top: .72em;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--gold);
    opacity: .7;
}

.figure {
    margin: 34px 0;
}

.figure .ph {
    aspect-ratio: 16/9;
    border-radius: 18px;
    border: 1px solid rgba(255, 255, 255, .07);
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(150deg, rgba(255, 255, 255, .06), rgba(255, 255, 255, .015));
    color: var(--muted);
    font-size: 13px;
    letter-spacing: .16em;
    transition: .5s;
}

.figure .ph:hover {
    border-color: var(--line);
    transform: translateY(-3px);
}

.figure figcaption {
    text-align: center;
    font-size: 12.5px;
    color: #66708a;
    letter-spacing: .12em;
    margin-top: 12px;
}

/* 分隔符 */
.divider {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 14px;
    margin: 56px 0;
    color: rgba(230, 192, 104, .5);
    font-size: 12px;
    letter-spacing: .4em;
}

.divider::before,
.divider::after {
    content: '';
    height: 1px;
    flex: 1;
    max-width: 120px;
    background: linear-gradient(90deg, transparent, var(--line), transparent);
}

/* ===== 上下篇 ===== */
.post-nav {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 30px;
    padding-top: 44px;
    border-top: 1px solid rgba(255, 255, 255, .06);
}

.post-nav a {
    display: block;
    text-decoration: none;
    background: var(--panel);
    border: 1px solid rgba(255, 255, 255, .07);
    border-radius: 16px;
    padding: 20px 22px;
    transition: .45s cubic-bezier(.2, .7, .2, 1);
}

.post-nav a:hover {
    background: var(--panel-hi);
    border-color: var(--line);
    transform: translateY(-4px);
    box-shadow: 0 18px 40px -20px rgba(0, 0, 0, .9);
}

.post-nav .label {
    font-size: 11.5px;
    letter-spacing: .24em;
    color: var(--gold);
    margin-bottom: 7px;
}

.post-nav .title {
    font-size: 15px;
    color: var(--text);
    font-weight: 600;
    letter-spacing: .03em;
}

.post-nav .next {
    text-align: right;
}

@media (max-width:600px) {
    .post-nav {
        grid-template-columns: 1fr;
    }

    .post-nav .next {
        text-align: left;
    }
}

/* ===== 页脚 ===== */
footer {
    text-align: center;
    padding: 80px 24px 60px;
    margin-top: 80px;
    border-top: 1px solid rgba(255, 255, 255, .06);
    position: relative;
    z-index: 2;
}

footer .sig {
    font-size: clamp(17px, 3vw, 22px);
    font-weight: 700;
    letter-spacing: .14em;
    background: linear-gradient(100deg, var(--gold-soft), var(--gold));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    margin-bottom: 12px;
}

footer p {
    color: var(--muted);
    font-size: 13px;
    letter-spacing: .12em;
}

footer .small {
    margin-top: 22px;
    font-size: 12px;
    color: #4c566b;
    letter-spacing: .1em;
}

/* 回到顶部 */
#top {
    position: fixed;
    right: 24px;
    bottom: 24px;
    width: 46px;
    height: 46px;
    border-radius: 50%;
    background: rgba(230, 192, 104, .12);
    border: 1px solid var(--line);
    color: var(--gold);
    font-size: 18px;
    cursor: pointer;
    z-index: 50;
    opacity: 0;
    pointer-events: none;
    transition: .4s;
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
}

#top.show {
    opacity: 1;
    pointer-events: auto;
}

#top:hover {
    background: var(--gold);
    color: #151006;
    transform: translateY(-3px);
}

.hero-nav {
    display: flex;
    gap: 16px;
    margin-top: 24px;
}

.hero-nav .nav-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13.5px;
    letter-spacing: .1em;
    color: var(--gold);
    text-decoration: none;
    padding: 7px 16px;
    border-radius: 100px;
    border: 1px solid var(--line);
    background: rgba(230, 192, 104, .05);
    transition: .35s;
}

.hero-nav .nav-link:hover {
    background: var(--gold);
    color: #151006;
    transform: translateX(-3px);
}