/* ============================================================
   JLKE 全局共享样式 - 顶部栏 / 页脚 / 基础变量 / 回顶按钮
   适用于所有页面引入，不会与页面专属样式冲突
   ============================================================ */

/* ---------- 基础重置 ---------- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
    -webkit-tap-highlight-color: transparent;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: system-ui, -apple-system, PingFang SC, Microsoft Yahei, sans-serif;
    user-select: none;
}

/* ---------- CSS 变量 ---------- */
:root[data-theme="light"] {
    --bg-main: #ffffff;
    --bg-card: #ffffff;
    --nav-bg: rgba(255, 255, 255, 0.93);
    --text-main: #000000;
    --text-gray: #555555;
    --text-light: #888888;
    --border: #eeeeee;
    --grad-light: linear-gradient(135deg, #fcfcfc, #f3f3f3);
    --grad-dark: linear-gradient(145deg, #222222, #0c0c0c);
    --shadow-sm: 0 2px 16px rgba(0, 0, 0, 0.05);
    --btn-glow: rgba(0, 0, 0, 0.08);
    --border-color: #e4e4e4;
    --gradient-light: linear-gradient(135deg, #f9f9f9 0%, #efefef 100%);
    --gradient-dark: linear-gradient(145deg, #191919 0%, #060606 100%);
    --shadow-normal: 0 6px 22px rgba(0, 0, 0, 0.07);
    --shadow-hover: 0 14px 36px rgba(0, 0, 0, 0.12);
    --shadow-soft: 0 4px 18px rgba(0, 0, 0, 0.06);
    --img-cover: rgba(0, 0, 0, 0.03);
}

:root[data-theme="dark"] {
    --bg-main: #080808;
    --bg-card: #141414;
    --nav-bg: rgba(12, 12, 12, 0.93);
    --text-main: #ffffff;
    --text-gray: #aaaaaa;
    --text-light: #707070;
    --border: #252525;
    --grad-light: linear-gradient(135deg, #191919, #0a0a0a);
    --grad-dark: linear-gradient(145deg, #2a2a2a, #111111);
    --shadow-sm: 0 2px 16px rgba(0, 0, 0, 0.2);
    --btn-glow: rgba(255, 255, 255, 0.12);
    --border-color: #272727;
    --gradient-light: linear-gradient(135deg, #161616 0%, #090909 100%);
    --gradient-dark: linear-gradient(145deg, #222222 0%, #101010 100%);
    --shadow-normal: 0 6px 22px rgba(0, 0, 0, 0.32);
    --shadow-hover: 0 14px 36px rgba(0, 0, 0, 0.45);
    --shadow-soft: 0 4px 18px rgba(0, 0, 0, 0.25);
    --img-cover: rgba(0, 0, 0, 0.22);
}

:root {
    --radius-full: 999px;
    --radius-md: 18px;
    --radius-sm: 8px;
    --radius-lg: 32px;
    --ease-smooth: cubic-bezier(0.19, 0.25, 0.22, 1);
    --transition: all 0.32s cubic-bezier(0.2, 0, 0.2, 1);
}

/* ---------- 顶部栏 header ---------- */
header {
    position: fixed;
    width: 100%;
    height: 72px;
    top: 0;
    left: 0;
    background: var(--nav-bg);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 clamp(12px, 3vw, 4%);
    z-index: 9999 !important;
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.logo {
    height: 100%;
    display: flex;
    align-items: center;
    cursor: pointer;
    flex-shrink: 0;
}

.logo img {
    height: clamp(36px, 5vh, 42px);
    transition: transform 0.3s ease, filter 0.3s ease;
}

.logo:hover img {
    transform: translateY(-3px);
    filter: drop-shadow(0 4px 6px rgba(128, 128, 128, 0.15));
}

.nav-list {
    display: flex;
    gap: clamp(16px, 2vw, 26px);
    align-items: center;
    flex-shrink: 0;
}

.nav-list a {
    text-decoration: none;
    color: var(--text-gray);
    font-size: 14px;
    font-weight: 500;
    transition: 0.28s;
    position: relative;
    white-space: nowrap;
    padding: 6px 4px;
}

.nav-list a:hover {
    color: var(--text-main);
}

.nav-list a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -5px;
    width: 0;
    height: 1.4px;
    background: var(--text-main);
    transition: width 0.3s ease;
}

.nav-list a:hover::after {
    width: 100%;
}

.header-right {
    display: flex;
    align-items: center;
    gap: clamp(6px, 1vw, 12px);
    flex-shrink: 0;
    position: relative;
    z-index: 99999 !important;
}

.nav-btn {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    border: 1px solid var(--border);
    background: transparent;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: 0.3s;
    outline: none;
    flex-shrink: 0;
    pointer-events: auto !important;
}

.nav-btn:hover {
    background: var(--btn-glow);
    box-shadow: 0 0 8px var(--btn-glow);
}

.nav-btn img {
    width: 20px;
    height: 20px;
    object-fit: contain;
}

.btn-exp {
    padding: 7px 20px;
    border-radius: var(--radius-full);
    background: var(--text-main);
    color: var(--bg-main);
    border: none;
    font-size: 14px;
    cursor: pointer;
    transition: 0.3s;
    outline: none;
    white-space: nowrap;
    flex-shrink: 0;
    pointer-events: auto !important;
}

.btn-exp:hover {
    opacity: 0.88;
    transform: translateY(-2px);
    box-shadow: 0 0 10px var(--btn-glow);
}

.hamburger {
    display: flex;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    margin-left: 8px;
    outline: none;
    flex-shrink: 0;
    pointer-events: auto !important;
}

.hamburger span {
    width: 22px;
    height: 1.8px;
    background: var(--text-main);
    transition: 0.32s var(--ease-smooth);
    transform-origin: center center;
}

.hamburger.active span:nth-child(1) {
    transform: translateY(6.8px) rotate(45deg);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

.hamburger.active span:nth-child(3) {
    transform: translateY(-6.8px) rotate(-45deg);
}

@media (min-width:769px) {
    .hamburger {
        display: none !important;
    }
}

@media (max-width:768px) {
    .nav-list {
        display: none !important;
    }

    .hamburger {
        display: flex !important;
    }
}

/* ---------- 移动端菜单 ---------- */
.mobile-menu {
    position: fixed;
    top: 72px;
    right: 0;
    width: min(270px, 72vw);
    height: calc(100vh - 72px);
    background: var(--nav-bg);
    backdrop-filter: blur(16px);
    border-left: 1px solid var(--border);
    transform: translateX(100%);
    transition: 0.38s var(--ease-smooth);
    padding: 40px clamp(20px, 5vw, 30px);
    z-index: 998;
}

.mobile-menu.active {
    transform: translateX(0);
}

.mobile-menu a {
    display: block;
    padding: 12px 0;
    color: var(--text-main);
    text-decoration: none;
    border-bottom: 1px solid var(--border);
    transition: 0.25s ease;
}

.mobile-menu a:hover {
    padding-left: 6px;
    color: var(--text-gray);
    background: var(--btn-glow);
}

/* ---------- 页脚 footer ---------- */
footer {
    min-height: 400px;
    background: var(--grad-dark);
    padding: 70px clamp(15px, 5vw, 4%);
    color: #aaa;
}

.foot-wrap {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 210px 1fr 1fr 1fr 1fr 1fr;
    gap: 14px;
    margin-bottom: 50px;
}

@media(max-width:992px) {
    .foot-wrap {
        grid-template-columns: 210px repeat(2, 1fr);
        gap: 20px;
    }
}

@media(max-width:640px) {
    .foot-wrap {
        grid-template-columns: 1fr;
        gap: 22px;
    }
}

.foot-item h4 {
    color: #fff;
    font-size: 17px;
    margin-bottom: 22px;
    letter-spacing: 1px;
}

.foot-item a {
    display: block;
    color: #aaa;
    text-decoration: none;
    margin-bottom: 11px;
    font-size: 14px;
    transition: 0.25s;
}

.foot-item a:hover {
    color: #fff;
    padding-left: 4px;
}

.foot-desc {
    font-size: 13.5px;
    line-height: 1.7;
    margin-top: 14px;
    color: #999;
    max-width: 200px;
}

.foot-logo {
    height: 48px;
}

[data-theme="light"] .logo-dark {
    display: none;
}

[data-theme="dark"] .logo-light {
    display: none;
}

/* 页脚社交按钮 */
.social-box {
    display: flex;
    gap: 14px;
    margin-top: 24px;
    justify-content: flex-start;
    max-width: fit-content;
}

.social-btn {
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    width: 40px !important;
    height: 40px !important;
    border-radius: 50% !important;
    border: none !important;
    background: transparent !important;
    box-sizing: border-box !important;
    padding: 0 !important;
    margin: 0 !important;
    text-decoration: none !important;
    transition: all 0.3s ease !important;
    overflow: hidden !important;
}

.social-btn img {
    width: 28px !important;
    height: 28px !important;
    object-fit: contain !important;
    display: block !important;
    margin: 0 !important;
    padding: 0 !important;
    vertical-align: middle !important;
    transition: transform 0.3s ease !important;
}

.social-btn:hover {
    background: var(--btn-glow) !important;
    transform: translateY(-3px) !important;
}

.social-btn:hover img {
    transform: scale(1.12) !important;
}

.copyright {
    border-top: 1px solid #333;
    padding-top: 30px;
    text-align: center;
    font-size: 13px;
    color: #777;
}

/* ---------- 回顶按钮 ---------- */
.scroll-top-btn {
    position: fixed;
    bottom: 40px;
    right: 40px;
    width: 52px;
    height: 52px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    background: var(--bg-card);
    box-shadow: var(--shadow-normal);
    cursor: pointer;
    z-index: 9999;
    padding: 0;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    -webkit-tap-highlight-color: transparent;
    user-select: none;
}

.scroll-top-btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
    border-color: var(--text-main);
}

.scroll-top-btn:active {
    transform: scale(0.92);
}

.scroll-top-btn img {
    width: 30px;
    height: 30px;
    object-fit: contain;
    display: block;
    pointer-events: none;
}

[data-theme="light"] .scroll-top-icon-light {
    display: block;
}

[data-theme="light"] .scroll-top-icon-dark {
    display: none;
}

[data-theme="dark"] .scroll-top-icon-light {
    display: none;
}

[data-theme="dark"] .scroll-top-icon-dark {
    display: block;
}

.scroll-top-btn.hidden {
    opacity: 0;
    pointer-events: none;
    transform: translateY(20px);
}

@media (max-width: 768px) {
    .scroll-top-btn {
        bottom: 24px;
        right: 24px;
        width: 46px;
        height: 46px;
    }

    .scroll-top-btn img {
        width: 26px;
        height: 26px;
    }
}