/* ============================================================
   星屿导航 · 前端公共样式
   年轻化设计：玻璃拟态 + 渐变光晕 + 柔和阴影 + 大圆角
   ============================================================ */

/* ---------- 设计令牌 ---------- */
:root {
    --accent: #6366f1;
    --accent-2: #ec4899;
    --radius: 18px;

    --bg: #f5f6ff;
    --bg-2: #ffffff;
    --card: rgba(255, 255, 255, .82);
    --card-solid: #ffffff;
    --border: rgba(15, 23, 42, .07);
    --border-strong: rgba(15, 23, 42, .12);

    --text: #111827;
    --text-2: #55607a;
    --text-3: #9aa3b8;

    --shadow-sm: 0 2px 8px rgba(17, 24, 39, .05);
    --shadow: 0 8px 28px rgba(17, 24, 39, .08);
    --shadow-lg: 0 18px 48px rgba(17, 24, 39, .13);
    --shadow-accent: 0 10px 30px -8px color-mix(in srgb, var(--accent) 55%, transparent);

    --ease: cubic-bezier(.22, 1, .36, 1);
    --ease-bounce: cubic-bezier(.34, 1.56, .64, 1);
}

/* ---------- 暗色主题 ---------- */
html[data-theme="dark"] {
    --bg: #0b0f1c;
    --bg-2: #121829;
    --card: rgba(28, 35, 55, .72);
    --card-solid: #1a2135;
    --border: rgba(255, 255, 255, .08);
    --border-strong: rgba(255, 255, 255, .16);
    --text: #eef2ff;
    --text-2: #a8b2cc;
    --text-3: #6f7a96;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, .3);
    --shadow: 0 8px 28px rgba(0, 0, 0, .4);
    --shadow-lg: 0 18px 48px rgba(0, 0, 0, .55);
}

/* ---------- 基础重置 ---------- */
*, *::before, *::after { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
                 "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.65;
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background .3s var(--ease), color .3s var(--ease);
}

a { color: inherit; text-decoration: none; }
button, input, textarea, select { font-family: inherit; font-size: inherit; }
img { max-width: 100%; display: block; }
::selection { background: color-mix(in srgb, var(--accent) 28%, transparent); }

/* ---------- 滚动条 ---------- */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
    background: color-mix(in srgb, var(--text-3) 40%, transparent);
    border-radius: 99px;
    border: 3px solid transparent;
    background-clip: content-box;
}
::-webkit-scrollbar-thumb:hover { background: color-mix(in srgb, var(--accent) 60%, transparent); background-clip: content-box; }

/* ============================================================
   背景光晕装饰
   ============================================================ */
.bg-orbs {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}
.bg-orbs span {
    position: absolute;
    border-radius: 50%;
    filter: blur(90px);
    opacity: .5;
    animation: orbFloat 22s ease-in-out infinite;
}
.bg-orbs span:nth-child(1) {
    width: 420px; height: 420px;
    background: color-mix(in srgb, var(--accent) 70%, transparent);
    top: -140px; left: -100px;
}
.bg-orbs span:nth-child(2) {
    width: 380px; height: 380px;
    background: color-mix(in srgb, var(--accent-2) 65%, transparent);
    top: 12%; right: -120px;
    animation-delay: -7s;
}
.bg-orbs span:nth-child(3) {
    width: 320px; height: 320px;
    background: color-mix(in srgb, var(--accent) 45%, var(--accent-2));
    bottom: -120px; left: 35%;
    animation-delay: -14s;
}
html[data-theme="dark"] .bg-orbs span { opacity: .3; }

@keyframes orbFloat {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33%      { transform: translate(40px, -50px) scale(1.1); }
    66%      { transform: translate(-35px, 35px) scale(.94); }
}

/* ============================================================
   顶部导航条
   ============================================================ */
.topbar {
    position: sticky;
    top: 0;
    z-index: 60;
    backdrop-filter: saturate(180%) blur(18px);
    -webkit-backdrop-filter: saturate(180%) blur(18px);
    background: color-mix(in srgb, var(--bg) 78%, transparent);
    border-bottom: 1px solid transparent;
    transition: border-color .3s, box-shadow .3s, background .3s;
}
.topbar.is-stuck {
    border-bottom-color: var(--border);
    box-shadow: 0 4px 20px rgba(17, 24, 39, .05);
}
.topbar-inner {
    max-width: 1240px;
    margin: 0 auto;
    padding: 14px 24px;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 18px;
}

/* 顶栏按钮组 */
.topbar-actions { display: flex; align-items: center; gap: 9px; flex-shrink: 0; }

.icon-btn {
    width: 42px; height: 42px;
    display: grid;
    place-items: center;
    border-radius: 13px;
    border: 1.5px solid var(--border-strong);
    background: var(--card);
    color: var(--text-2);
    cursor: pointer;
    font-size: 17px;
    transition: all .25s var(--ease);
    text-decoration: none;
    position: relative;
}
.icon-btn:hover {
    color: var(--accent);
    border-color: color-mix(in srgb, var(--accent) 45%, transparent);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}
.icon-btn:active { transform: translateY(0) scale(.96); }

/* ============================================================
   主体容器
   ============================================================ */
.wrap {
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 24px 80px;
    position: relative;
    z-index: 1;
}

/* ---------- Hero（只保留标题） ---------- */
.hero {
    padding: 64px 0 40px;
    text-align: center;
    animation: fadeUp .7s var(--ease) both;
}

.hero h1 {
    margin: 0;
    font-size: clamp(30px, 5.2vw, 52px);
    font-weight: 860;
    letter-spacing: -.035em;
    line-height: 1.12;
    background: linear-gradient(120deg, var(--text) 8%, var(--accent) 48%, var(--accent-2) 92%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    background-size: 200% auto;
    animation: shimmer 7s ease-in-out infinite;
}
@keyframes shimmer {
    0%, 100% { background-position: 0% center; }
    50%      { background-position: 100% center; }
}

/* ---------- 公告 ---------- */
.announce {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 20px;
    border-radius: var(--radius);
    background: linear-gradient(100deg,
        color-mix(in srgb, var(--accent) 12%, transparent),
        color-mix(in srgb, var(--accent-2) 10%, transparent));
    border: 1px solid color-mix(in srgb, var(--accent) 22%, transparent);
    margin-bottom: 30px;
    font-size: 14px;
    color: var(--text);
    animation: fadeUp .7s var(--ease) both;
}
.announce .ico { font-size: 17px; flex-shrink: 0; }

/* ============================================================
   站点卡片网格（简洁按钮框）
   ============================================================ */
.section { margin-bottom: 46px; animation: fadeUp .6s var(--ease) both; }

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
    gap: 14px;
}

.site-card {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    padding: 18px 18px;
    border-radius: var(--radius);
    /* 渐变描边：外圈透明，由 ::after 绘制渐变边框 */
    border: 1.5px solid transparent;
    background:
        linear-gradient(var(--card-solid), var(--card-solid)) padding-box,
        linear-gradient(135deg,
            color-mix(in srgb, var(--accent) 38%, transparent),
            color-mix(in srgb, var(--accent-2) 32%, transparent)
        ) border-box;
    overflow: hidden;
    text-align: center;
    isolation: isolate;
    transition:
        transform .34s var(--ease),
        box-shadow .34s var(--ease),
        background .34s var(--ease);
    animation: cardIn .5s var(--ease) both;
}

/* 悬停时铺满的渐变底 */
.site-card::before {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    opacity: 0;
    transform: scale(.96);
    transition: opacity .34s var(--ease), transform .34s var(--ease);
    z-index: -1;
}

/* 光泽扫过 */
.site-card::after {
    content: "";
    position: absolute;
    top: 0;
    left: -120%;
    width: 70%;
    height: 100%;
    background: linear-gradient(100deg,
        transparent 0%,
        rgba(255, 255, 255, .55) 50%,
        transparent 100%);
    transform: skewX(-18deg);
    transition: left .65s var(--ease);
    pointer-events: none;
}

.site-card:hover {
    transform: translateY(-6px);
    background:
        linear-gradient(var(--card-solid), var(--card-solid)) padding-box,
        linear-gradient(135deg, var(--accent), var(--accent-2)) border-box;
    box-shadow: var(--shadow-accent), var(--shadow-lg);
}
.site-card:hover::before { opacity: 1; transform: scale(1); }
.site-card:hover::after { left: 130%; }
.site-card:hover .site-name { color: #fff; text-shadow: 0 1px 10px rgba(0, 0, 0, .18); }
.site-card:active { transform: translateY(-2px) scale(.985); }

.site-body { position: relative; min-width: 0; z-index: 1; }
.site-name {
    font-size: 15.5px;
    font-weight: 720;
    letter-spacing: -.015em;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: var(--text);
    transition: color .3s var(--ease), text-shadow .3s var(--ease);
}

/* 空状态 */
.empty {
    text-align: center;
    padding: 90px 20px;
    color: var(--text-3);
    animation: fadeUp .5s var(--ease) both;
}
.empty .emoji { font-size: 60px; margin-bottom: 18px; display: block; opacity: .85; }
.empty h3 { margin: 0 0 8px; font-size: 19px; font-weight: 700; color: var(--text-2); }
.empty p { margin: 0; font-size: 14px; }

/* ============================================================
   页脚
   ============================================================ */
.footer {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: 34px 24px 42px;
    border-top: 1px solid var(--border);
    color: var(--text-3);
    font-size: 13px;
    line-height: 2;
}
.footer a { color: var(--accent); font-weight: 600; }
.footer a:hover { text-decoration: underline; }
.footer .ver {
    display: inline-block;
    margin-left: 8px;
    padding: 2px 10px;
    border-radius: 99px;
    background: color-mix(in srgb, var(--accent) 12%, transparent);
    color: var(--accent);
    font-size: 11.5px;
    font-weight: 700;
    cursor: pointer;
    transition: all .25s;
    border: 0;
}
.footer .ver:hover { background: var(--accent); color: #fff; }
.footer-links { margin-bottom: 6px; }

/* ============================================================
   版本更新弹窗
   ============================================================ */
.modal-mask {
    position: fixed;
    inset: 0;
    background: rgba(8, 11, 22, .55);
    -webkit-backdrop-filter: blur(6px);
    backdrop-filter: blur(6px);
    z-index: 200;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 22px;
    animation: fadeIn .25s var(--ease);
}
.modal-mask.open { display: flex; }

.modal {
    width: 100%;
    max-width: 560px;
    max-height: 78vh;
    border-radius: 24px;
    background: var(--card-solid);
    border: 1px solid var(--border-strong);
    box-shadow: var(--shadow-lg);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    animation: popIn .38s var(--ease-bounce);
}
.modal-head {
    padding: 22px 24px 16px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 12px;
}
.modal-head h3 { margin: 0; font-size: 18px; font-weight: 780; letter-spacing: -.02em; }
.modal-head .close {
    margin-left: auto;
    width: 34px; height: 34px;
    border-radius: 11px;
    border: 0;
    background: var(--border);
    color: var(--text-2);
    cursor: pointer;
    font-size: 17px;
    transition: all .2s;
}
.modal-head .close:hover { background: #ef4444; color: #fff; transform: rotate(90deg); }

.modal-body { padding: 8px 24px 24px; overflow-y: auto; }

.ver-item {
    padding: 18px 0;
    border-bottom: 1px dashed var(--border);
}
.ver-item:last-child { border-bottom: 0; }
.ver-top {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 9px;
    flex-wrap: wrap;
}
.ver-no {
    padding: 3px 11px;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 800;
    color: #fff;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    letter-spacing: -.01em;
}
.ver-title { font-weight: 700; font-size: 14.5px; }
.ver-date { margin-left: auto; font-size: 12px; color: var(--text-3); font-weight: 600; }
.ver-tag {
    font-size: 11px;
    padding: 2px 9px;
    border-radius: 6px;
    font-weight: 700;
    background: color-mix(in srgb, var(--accent) 14%, transparent);
    color: var(--accent);
}
.ver-tag.fix     { background: rgba(239, 68, 68, .13); color: #ef4444; }
.ver-tag.feature { background: rgba(99, 102, 241, .14); color: #6366f1; }
.ver-tag.opt     { background: rgba(34, 197, 94, .14); color: #16a34a; }
.ver-content {
    font-size: 13.5px;
    color: var(--text-2);
    line-height: 1.85;
    white-space: pre-wrap;
    word-break: break-word;
}

/* ============================================================
   动画
   ============================================================ */
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(18px); }
    to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}
@keyframes popIn {
    from { opacity: 0; transform: scale(.92) translateY(14px); }
    to   { opacity: 1; transform: scale(1) translateY(0); }
}
@keyframes cardIn {
    from { opacity: 0; transform: translateY(14px) scale(.98); }
    to   { opacity: 1; transform: translateY(0) scale(1); }
}

/* 卡片入场错峰 */
.site-card:nth-child(1)  { animation-delay: .02s; }
.site-card:nth-child(2)  { animation-delay: .05s; }
.site-card:nth-child(3)  { animation-delay: .08s; }
.site-card:nth-child(4)  { animation-delay: .11s; }
.site-card:nth-child(5)  { animation-delay: .14s; }
.site-card:nth-child(6)  { animation-delay: .17s; }
.site-card:nth-child(7)  { animation-delay: .20s; }
.site-card:nth-child(8)  { animation-delay: .23s; }
.site-card:nth-child(n+9){ animation-delay: .26s; }

/* ============================================================
   Toast 提示
   ============================================================ */
.toast-wrap {
    position: fixed;
    top: 22px; left: 50%;
    transform: translateX(-50%);
    z-index: 999;
    display: flex;
    flex-direction: column;
    gap: 10px;
    pointer-events: none;
}
.toast {
    padding: 12px 22px;
    border-radius: 14px;
    background: var(--card-solid);
    border: 1px solid var(--border-strong);
    box-shadow: var(--shadow-lg);
    font-size: 14px;
    font-weight: 600;
    color: var(--text);
    animation: toastIn .35s var(--ease-bounce);
    display: flex;
    align-items: center;
    gap: 9px;
}
.toast.ok   { border-color: rgba(34, 197, 94, .4); }
.toast.err  { border-color: rgba(239, 68, 68, .4); }
@keyframes toastIn {
    from { opacity: 0; transform: translateY(-18px) scale(.94); }
    to   { opacity: 1; transform: translateY(0) scale(1); }
}

/* ============================================================
   返回顶部
   ============================================================ */
.to-top {
    position: fixed;
    right: 26px; bottom: 26px;
    width: 46px; height: 46px;
    border-radius: 15px;
    border: 1.5px solid var(--border-strong);
    background: var(--card-solid);
    color: var(--text-2);
    font-size: 18px;
    cursor: pointer;
    display: grid;
    place-items: center;
    box-shadow: var(--shadow);
    opacity: 0;
    visibility: hidden;
    transform: translateY(14px);
    transition: all .32s var(--ease);
    z-index: 70;
}
.to-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.to-top:hover {
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    color: #fff;
    border-color: transparent;
    transform: translateY(-3px);
}

/* ============================================================
   响应式 —— 平板与小屏电脑
   ============================================================ */
@media (max-width: 900px) {
    .wrap { padding: 0 18px 70px; }
    .topbar-inner { padding: 12px 18px; gap: 12px; }
    .grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 12px; }
    .hero { padding: 46px 0 32px; }
}

/* ============================================================
   手机格式适配 —— 窄屏切换为单列大按钮
   ============================================================ */
@media (max-width: 640px) {
    .wrap { padding: 0 16px 60px; }
    .topbar-inner { padding: 10px 16px; }
    .icon-btn { width: 40px; height: 40px; border-radius: 12px; font-size: 16px; }

    .hero { padding: 40px 0 26px; }
    .hero h1 { font-size: 30px; }

    .announce { padding: 12px 16px; font-size: 13px; border-radius: 14px; margin-bottom: 22px; }

    /* 单列大按钮，拇指友好 */
    .grid { grid-template-columns: 1fr; gap: 11px; }
    .site-card {
        justify-content: center;
        padding: 19px 16px;
        border-radius: 16px;
    }
    /* 触屏没有 hover，按下即给渐变反馈 */
    .site-card:active {
        background:
            linear-gradient(135deg, var(--accent), var(--accent-2)) padding-box,
            linear-gradient(135deg, var(--accent), var(--accent-2)) border-box;
        box-shadow: var(--shadow-accent);
    }
    .site-card:active .site-name { color: #fff; }
    .site-name { font-size: 16.5px; }

    .footer { padding: 28px 16px 36px; }
    .modal { max-height: 84vh; border-radius: 20px; }
    .modal-head { padding: 18px 20px 14px; }
    .modal-body { padding: 6px 20px 20px; }

    .to-top { right: 16px; bottom: 20px; width: 42px; height: 42px; }
}

/* 减少动效偏好 */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: .01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: .01ms !important;
    }
    html { scroll-behavior: auto; }
}