:root {
    --bg-overlay: rgba(12, 17, 26, 0.58);
    --bg-overlay-deep: rgba(8, 12, 18, 0.72);
    --bg-filter: brightness(0.9) saturate(1);
    --text-color: #eef3ff;
    --muted-text: #b8c0d9;
    --card-rgb: 15, 22, 34;
    --card-border: rgba(255, 255, 255, 0.2);
    --accent: #7ea6ff;
    --accent-strong: #9bb9ff;
    --shadow: 0 12px 36px rgba(0, 0, 0, 0.3);
    --radius: 18px;
    --transition: 240ms ease;
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
    min-height: 100%;
}

html,
body {
    scrollbar-width: none;
    -ms-overflow-style: none;
}

html::-webkit-scrollbar,
body::-webkit-scrollbar {
    width: 0;
    height: 0;
}

body {
    position: relative;
    min-height: 100vh;
    --card-opacity: 0.7;
    --radius: 18px;
    --fab-radius: 12px;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    color: var(--text-color);
    font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", Arial, sans-serif;
    line-height: 1.6;
    background-color: #090d15;
    overflow-x: hidden;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    background-image:
        linear-gradient(to bottom, var(--bg-overlay), var(--bg-overlay-deep)), url("../asset/img/background.jpg");
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    filter: var(--bg-filter);
    z-index: -2;
    transform: translateZ(0);
}

body.theme-day {
    --bg-overlay: rgba(92, 112, 146, 0.4);
    --bg-overlay-deep: rgba(56, 74, 104, 0.58);
    --bg-filter: brightness(0.72) saturate(0.92);
    --text-color: #0a1427;
    --muted-text: #162740;
    --card-rgb: 255, 255, 255;
    --card-border: rgba(86, 104, 138, 0.45);
    --accent: #153fa7;
    --accent-strong: #0f3388;
    --shadow: 0 10px 30px rgba(18, 27, 44, 0.15);
}

body.theme-day .card {
    box-shadow: 0 12px 28px rgba(18, 27, 44, 0.2);
}

.page {
    width: min(820px, 88vw);
    margin: 2rem auto 1.5rem;
    display: grid;
    grid-template-columns: repeat(2, minmax(260px, 1fr));
    grid-template-areas:
        "about social"
        "project game"
        "update friends";
    gap: 1rem;
}

.site-header {
    width: calc((min(820px, 88vw) - 1rem) / 2);
    margin: 1.1rem auto 0;
    text-align: center;
    background: rgba(var(--card-rgb), var(--card-opacity));
    border: 1px solid var(--card-border);
    border-radius: 18px;
    box-shadow: var(--shadow);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 0.9rem 1rem;
    transition:
        transform var(--transition),
        box-shadow var(--transition),
        background-color var(--transition),
        border-color var(--transition);
}

.site-header:hover {
    transform: translateY(-4px);
}

.site-title {
    margin: 0;
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    font-size: clamp(1.3rem, 2.2vw, 1.75rem);
    letter-spacing: 0.02em;
    color: var(--text-color);
    text-shadow: 0 6px 16px rgba(0, 0, 0, 0.28);
}

.site-title img {
    width: 24px;
    height: 24px;
    border-radius: 6px;
}

.card {
    background: rgba(var(--card-rgb), var(--card-opacity));
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 1.25rem;
    min-height: 290px;
    animation: fadeUp 0.55s var(--transition) both;
    transition:
        transform var(--transition),
        box-shadow var(--transition),
        background-color var(--transition),
        border-color var(--transition);
    overflow: hidden;
    will-change: transform;
}

.card::after {
    content: "";
    position: absolute;
    inset: -150% -60%;
    background: linear-gradient(115deg, transparent 35%, rgba(255, 255, 255, 0.16) 50%, transparent 65%);
    transform: translateX(-100%);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition);
}

.card:hover {
    transform: translateY(-6px) scale(1.01);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.33);
}

.card:hover::after {
    opacity: 1;
    animation: sheen 1000ms ease;
}

.card h2 {
    margin: 0 0 0.85rem;
    font-size: 1.18rem;
    letter-spacing: 0.01em;
}

.about-card {
    grid-area: about;
}

.project-card {
    grid-area: project;
}

.social-card {
    grid-area: social;
}

.game-card {
    grid-area: game;
}

.update-card {
    grid-area: update;
}

.friends-card {
    grid-area: friends;
}

.about-inner {
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    gap: 0.25rem;
}

.avatar {
    width: 122px;
    height: 122px;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.4);
    object-fit: cover;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
    margin-bottom: 0.5rem;
    transition: transform var(--transition);
}

.avatar:hover {
    transform: scale(1.05) rotate(2deg);
}

.about-line {
    margin: 0.2rem 0;
}

.label {
    color: var(--accent-strong);
    font-weight: 600;
}

.intro {
    color: var(--muted-text);
    max-width: 95%;
}

.project-scroll {
    max-height: 216px;
    overflow-y: auto;
    overscroll-behavior: contain;
    padding-right: 0.5rem;
}

.project-item {
    display: flex;
    gap: 0.75rem;
    align-items: flex-start;
    padding: 0.7rem 0.2rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
    transition:
        transform var(--transition),
        background-color var(--transition);
    border-radius: 10px;
}

body.theme-day .project-item {
    border-bottom-color: rgba(66, 82, 113, 0.28);
}

.project-item:hover {
    transform: translateX(6px);
    background-color: rgba(255, 255, 255, 0.06);
}

body.theme-day .project-item:hover {
    background-color: rgba(33, 51, 84, 0.08);
}

.project-item:last-child {
    border-bottom: none;
}

.project-item img {
    width: 26px;
    height: 26px;
    border-radius: 6px;
    flex-shrink: 0;
}

.project-item a,
.social-card a {
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
    position: relative;
    transition:
        color var(--transition),
        text-shadow var(--transition);
}

.project-title {
    color: var(--accent-strong);
    font-weight: 600;
}

.project-item a::after,
.social-card a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -2px;
    width: 100%;
    height: 1px;
    background-color: currentColor;
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition);
}

.project-item a:hover,
.social-card a:hover {
    color: var(--accent-strong);
    text-shadow: 0 0 8px rgba(126, 166, 255, 0.4);
}

.project-item a:hover::after,
.social-card a:hover::after {
    transform: scaleX(1);
}

.project-item p {
    margin: 0.25rem 0 0;
    color: var(--muted-text);
}

.social-card ul,
.game-card ul,
.friends-card ul {
    margin: 0;
    padding-left: 1.2rem;
}

.social-card li,
.game-card li,
.friends-card li {
    margin-bottom: 0.35rem;
    transition:
        transform var(--transition),
        color var(--transition);
}

.social-card li:hover,
.game-card li:hover,
.friends-card li:hover {
    transform: translateX(4px);
}

.update-scroll {
    max-height: 238px;
    overflow-y: auto;
    overscroll-behavior: contain;
    padding-right: 0.25rem;
}

.update-tree,
.update-tree ul {
    list-style: none;
    margin: 0;
    padding-left: 1rem;
}

.update-tree {
    padding-left: 0.2rem;
}

.update-tree li {
    position: relative;
    margin: 0.15rem 0;
    color: var(--muted-text);
}

.update-tree li::before {
    content: "";
    position: absolute;
    left: -0.75rem;
    top: 0.8rem;
    width: 0.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.25);
}

.update-tree li::after {
    content: "";
    position: absolute;
    left: -0.75rem;
    top: -0.55rem;
    bottom: -0.55rem;
    border-left: 1px solid rgba(255, 255, 255, 0.2);
}

.update-tree > li::before,
.update-tree > li::after {
    left: -0.45rem;
}

.update-tree li:last-child::after {
    bottom: 0.85rem;
}

.update-tree .update-title {
    color: var(--text-color);
    font-weight: 600;
}

.update-tree a,
.friends-card a {
    color: var(--accent);
    text-decoration: none;
}

.update-tree a:hover,
.friends-card a:hover {
    color: var(--accent-strong);
    text-decoration: underline;
}

.floating-tools {
    position: fixed;
    right: 1.2rem;
    bottom: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
    z-index: 10;
}

.fab {
    width: 46px;
    height: 46px;
    border: 1px solid var(--card-border);
    border-radius: var(--fab-radius);
    background: rgba(var(--card-rgb), var(--card-opacity));
    color: var(--text-color);
    cursor: pointer;
    font-size: 1.06rem;
    box-shadow: var(--shadow);
    transition:
        transform var(--transition),
        background-color var(--transition),
        border-color var(--transition);
    animation: floaty 2.8s ease-in-out infinite;
}

.fab:hover {
    transform: translateY(-2px);
}

.fab:active {
    transform: scale(0.95);
}

.fab.spin {
    animation: spinOnce 420ms ease;
}

.opacity-tool,
.radius-tool {
    position: relative;
}

.opacity-panel,
.radius-panel {
    position: absolute;
    right: calc(100% + 0.6rem);
    top: 50%;
    transform: translateY(-50%) scaleX(0.4);
    transform-origin: right center;
    opacity: 0;
    pointer-events: none;
    width: 220px;
    height: 46px;
    border-radius: var(--fab-radius);
    border: 1px solid var(--card-border);
    background: rgba(var(--card-rgb), var(--card-opacity));
    display: flex;
    align-items: center;
    gap: 0.65rem;
    padding: 0 0.85rem;
    box-shadow: var(--shadow);
    transition:
        opacity var(--transition),
        transform 320ms cubic-bezier(0.2, 0.7, 0.2, 1);
}

.opacity-tool.open .opacity-panel,
.radius-tool.open .radius-panel {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(-50%) scaleX(1);
}

.opacity-panel label,
.radius-panel label {
    font-size: 0.85rem;
    color: var(--muted-text);
    white-space: nowrap;
}

.opacity-panel input[type="range"],
.radius-panel input[type="range"] {
    width: 100%;
    accent-color: var(--accent);
}

.site-footer {
    width: calc((min(820px, 88vw) - 1rem) / 2);
    margin: 0 auto 1.2rem;
    text-align: center;
    color: var(--muted-text);
    font-size: 0.95rem;
    background: rgba(var(--card-rgb), var(--card-opacity));
    border: 1px solid var(--card-border);
    border-radius: 18px;
    box-shadow: var(--shadow);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 0.8rem 1rem;
    transition:
        transform var(--transition),
        box-shadow var(--transition),
        background-color var(--transition),
        border-color var(--transition);
}

.site-footer:hover {
    transform: translateY(-3px);
}

body.theme-day .site-footer {
    color: #0f1b30;
}

body.theme-day .site-footer a:not(:hover) {
    color: #0f1b30;
}

body.theme-day .beian a:hover {
    color: var(--accent-strong);
}

.site-footer p {
    margin: 0.35rem 0;
}

.beian {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.beian a {
    color: inherit;
    text-decoration: none;
    border-bottom: 1px dashed transparent;
    transition:
        color var(--transition),
        border-color var(--transition);
}

.beian a:hover {
    color: var(--accent);
    border-color: currentColor;
}

.beian img {
    width: 18px;
    height: 18px;
}

.project-scroll::-webkit-scrollbar,
.update-scroll::-webkit-scrollbar {
    width: 8px;
}

.project-scroll::-webkit-scrollbar-track,
.update-scroll::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.08);
    border-radius: 10px;
}

.project-scroll::-webkit-scrollbar-thumb,
.update-scroll::-webkit-scrollbar-thumb {
    background: rgba(126, 166, 255, 0.65);
    border-radius: 10px;
}

.project-scroll,
.update-scroll {
    scrollbar-color: rgba(126, 166, 255, 0.65) rgba(255, 255, 255, 0.08);
    scrollbar-width: thin;
}

@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(16px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes sheen {
    from {
        transform: translateX(-100%);
    }
    to {
        transform: translateX(100%);
    }
}

@keyframes floaty {
    0%,
    100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-3px);
    }
}

@keyframes spinOnce {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(180deg);
    }
}

.card:nth-child(1) {
    animation-delay: 0ms;
}

.card:nth-child(2) {
    animation-delay: 90ms;
}

.card:nth-child(3) {
    animation-delay: 180ms;
}

.card:nth-child(4) {
    animation-delay: 260ms;
}

@media (max-width: 980px) {
    .site-header {
        width: min(820px, 88vw);
    }

    .page {
        grid-template-columns: 1fr;
        grid-template-areas:
            "about"
            "project"
            "social"
            "game"
            "update"
            "friends";
    }

    .site-footer {
        width: min(820px, 88vw);
    }

    .card {
        min-height: auto;
    }

    .project-scroll {
        max-height: 180px;
    }
}

@media (max-width: 560px) {
    .floating-tools {
        right: 0.75rem;
        bottom: 1rem;
    }

    .fab {
        width: 42px;
        height: 42px;
    }

    .opacity-panel {
        width: 180px;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }

    .fab {
        animation: none !important;
    }
}