* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: system-ui, sans-serif;
        }
	::-webkit-scrollbar {
		  display: none;
	}
        html, body {
            width: 100vw;
            height: 100vh;
            background-color: #f8fafc;
	    scrollbar-width: none;
	   -ms-overflow-style: none;
        }
        #particleCanvas {
            position: fixed;
            inset: 0;
            z-index: 0;
            pointer-events: none;
        }
        .page-wrap {
            position: relative;
            z-index: 2;
            width: 100%;
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 24px;
            flex-shrink: 0;
            overflow: hidden;
        }
        .logo-box {
            width: clamp(150px, 24vw, 340px);
            aspect-ratio: 4096 / 1714;
        }
        .logo-box img {
            width: 100%;
            height: 100%;
            object-fit: contain;
        }

        .cssbuttons-io-button {
            background: #a370f0;
            color: white;
            font-family: inherit;
            padding: 0.35em;
            padding-left: 1.2em;
            font-size: 17px;
            font-weight: 500;
            border-radius: 0.9em;
            border: none;
            letter-spacing: 0.05em;
            display: flex;
            align-items: center;
            box-shadow: inset 0 0 1.6em -0.6em #714da6;
            overflow: hidden;
            position: relative;
            height: 2.8em;
            padding-right: 3.3em;
            cursor: pointer;
        }
        .cssbuttons-io-button .icon {
            background: white;
            margin-left: 1em;
            position: absolute;
            display: flex;
            align-items: center;
            justify-content: center;
            height: 2.2em;
            width: 2.2em;
            border-radius: 0.7em;
            box-shadow: 0.1em 0.1em 0.6em 0.2em #7b52b9;
            right: 0.3em;
            transition: all 0.3s;
        }
        .cssbuttons-io-button:hover .icon {
            width: calc(100% - 0.6em);
        }
        .cssbuttons-io-button .icon svg {
            width: 1.1em;
            transition: transform 0.3s;
            color: #7b52b9;
        }
        .cssbuttons-io-button:hover .icon svg {
            transform: translateX(0.1em);
        }
        .cssbuttons-io-button:active .icon {
            transform: scale(0.95);
        }

        /* 右侧侧边抽屉 */
        .drawer-overlay {
            position: fixed;
            inset: 0;
            background: rgba(0,0,0,0.3);
            z-index: 10;
            opacity: 0;
            visibility: hidden;
            transition: 0.3s ease;
        }
        .drawer-overlay.open {
            opacity: 1;
            visibility: visible;
        }
        .info-drawer {
            position: fixed;
            top: 0;
            right: 0;
            height: 100vh;
            width: min(420px, 100vw);
            background: rgba(255,255,255,0.72);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-left: 1px solid rgba(220,220,220,0.6);
            padding: 32px 28px;
            overflow-y: auto;
            z-index: 11;
            transform: translateX(100%);
            transition: transform 0.35s cubic-bezier(0.4,0,0.2,1);
        }
        .info-drawer.open {
            transform: translateX(0);
        }
        .drawer-close {
            position: absolute;
            top:16px;
            right:20px;
            font-size:26px;
            cursor:pointer;
            color:#444;
        }
        .info-drawer h3 {
            margin-bottom: 20px;
            font-size: 22px;
            color: #1e293b;
        }
        .info-drawer p {
            line-height: 1.8;
            color: #334155;
            font-size: 15px;
            margin: 8px 0;
        }

        main {
            flex: 1;
            display: flex;
            gap: 24px;
            padding: 24px;
            align-items: stretch;
            min-height: 0;
            overflow: hidden;
        }
        @media (max-width:768px) {
            main {
                flex-direction: column;
                overflow: visible;
            }
        }

        /* ========== 【重点修改】精选推荐 仅边框流光渐变 ========== */
        @property --rotate {
            syntax: "<angle>";
            initial-value: 0deg;
            inherits: false;
        }
        .recommend-card {
            position: relative;
            flex: 1;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        /* 旋转彩色边框层（镂空，只保留边线） */
        .recommend-card::before {
            content: "";
            position: absolute;
            inset: 0;
            border-radius: inherit;
            background: conic-gradient(from var(--rotate), #ff6b6b,#4ecdc4,#45b7d1,#a855f7,#ff6b6b);
            animation: rotateBorder 4s linear infinite;
            /* mask实现中间挖空，只显示一圈边框 */
            -webkit-mask:
                linear-gradient(#fff 0 0) content-box,
                linear-gradient(#fff 0 0);
            -webkit-mask-composite: xor;
            mask-composite: exclude;
            padding: 2px; /* 控制彩色边框粗细 */
            z-index: 1;
        }
        @keyframes rotateBorder {
            to {--rotate:360deg;}
        }
        /* 内部毛玻璃内容层（纯净底色，不会透出渐变） */
        .card-inner {
            width: calc(100% - 4px);
            height: calc(100% - 4px);
            background: rgba(255,255,255,0.65);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border-radius: 12px;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 32px;
            padding: 20px;
            z-index: 2;
        }
        .card-inner h2 {
            color: #222;
        }
 
        .studyPY-button {
        padding: 0;
        margin: 0;
        border: none;
        background: none;
        cursor: pointer;
        }
        .studyPY-button {
        --primary-color: #111;
        --hovered-color: #c84747;
        position: relative;
        display: flex;
        font-weight: 600;
        font-size: 20px;
        gap: 0.5rem;
        align-items: center;
        }
        .studyPY-button p {
        margin: 0;
        position: relative;
        font-size: 20px;
        color: var(--primary-color);
        }
        .studyPY-button::after {
        position: absolute;
        content: "";
        width: 0;
        left: 0;
        bottom: -7px;
        background: var(--hovered-color);
        height: 2px;
        transition: 0.3s ease-out;
        }
        .studyPY-button p::before {
        position: absolute;
        /*   box-sizing: border-box; */
        content: "点击前往";
        width: 0%;
        inset: 0;
        color: var(--hovered-color);
        overflow: hidden;
        transition: 0.3s ease-out;
        }
        .studyPY-button:hover::after {
        width: 100%;
        }
        .studyPY-button:hover p::before {
        width: 100%;
        }
        .studyPY-button:hover svg {
        transform: translateX(4px);
        color: var(--hovered-color);
        }
        .studyPY-button svg {
        color: var(--primary-color);
        transition: 0.2s;
        position: relative;
        width: 15px;
        transition-delay: 0.2s;
        }



        .menu-container {
            flex: 0 0 320px;
            border: 1px solid rgba(203, 213, 225,0.55);
            border-radius: 12px;
            background: rgba(255,255,255,0.45);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            overflow-y: auto;
            padding: 16px;
            max-height: 100%;
            min-height: 0;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }
        .menu-container::-webkit-scrollbar {
            width: 0;
            height: 0;
        }
        @media (max-width:768px) {
            .menu-container {
                flex: none;
                width: 100%;
                max-height: none;
                overflow: visible;
            }
        }
        .menu-item {
            padding: 12px 14px;
            border-radius: 8px;
            margin-bottom: 8px;
            background: rgba(248, 250, 252,0.68);
            backdrop-filter: blur(4px);
            cursor: pointer;
            transition: 0.2s;
        }
        .menu-item:hover {
            background: rgba(226, 232, 240,0.8);
        }
        .btn {
            font-size: 13px;
            background: transparent;
            border: none;
            padding: 1em 1.5em;
            color: #000000;
            text-transform: uppercase;
            position: relative;
            transition: 0.5s ease;
            cursor: pointer;
        }

        .btn::before {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            height: 2px;
            width: 0;
            background-color: #000000;
            transition: 0.5s ease;
        }

        .btn:hover {
            color: #1e1e2b;
            transition-delay: 0.5s;
        }

        .btn:hover::before {
            width: 100%;
        }

        .btn::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            height: 0;
            width: 100%;
            background-color: #d7d7d7;
            transition: 0.4s ease;
            z-index: -1;
        }

        .btn:hover::after {
            height: 100%;
            transition-delay: 0.4s;
            color: aliceblue;
        }

/* 站点头部布局 */
.logo-box {
    width: clamp(120px, 20vw, 280px);
    display: flex;
    align-items: center;
    gap: 12px;
}
.logo-box img {
    flex-shrink: 0;
    width: 100%;
    height: auto;
    object-fit: contain;
}

/* 仅淡出中间main区域 */
main.page-fade {
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.4s ease;
}

        .footer-note {
            position: fixed;
            bottom: 8px;
            left: 50%;
            transform: translateX(-50%);
            color: #6b7280; /* 小型灰色文字 */
            font-size: 5px;
            line-height: 1;
            opacity: 0.9;
            pointer-events: none;
            z-index: 9999;
            font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
        }