/* 精灵星空 · 官网首页样式 (home.css) */

:root {
    --bg: #0b1020;
    --card: #141a33;
    --text: #e8ebff;
    --muted: #9aa3ff;
    --accent: #6cf2c2;
    --accent2: #7aa2ff;
    --subtitle-green: #6cf2c2;
    --container-width: 1400px;
    --container-padding: clamp(16px, 5vw, 40px);
    --transition-smooth: cubic-bezier(0.23, 1, 0.32, 1);
    --transition-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
    --shadow-card: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
    --shadow-card-hover: 0 20px 25px -5px rgba(0,0,0,0.2), 0 8px 10px -6px rgba(0,0,0,0.1);
}

:root[data-theme="light"] {
    --bg: #fdf6e3;
    --card: #ffffff;
    --text: #1b1b1b;
    --muted: #555555;
    --accent: #6cf2c2;
    --accent2: #7aa2ff;
    --subtitle-green: #007a3d;
}

* {
    box-sizing: border-box;
    transition: background-color 0.4s, color 0.4s, border-color 0.4s;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.65;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

::selection {
    background: rgba(122, 162, 255, 0.25);
    color: inherit;
}

::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(122, 162, 255, 0.2);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(122, 162, 255, 0.4);
}

:root[data-theme="light"] ::-webkit-scrollbar-thumb {
    background: rgba(122, 162, 255, 0.25);
}

/* Skip link */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--accent2);
    color: #0b1020;
    padding: 8px;
    text-decoration: none;
    border-radius: 4px;
    font-weight: 600;
    z-index: 101;
}

.skip-link:focus {
    top: 6px;
}

/* Theme toggle (圆形图标按钮) */
/* Theme toggle (圆形图标按钮，仅图标、禁止溢出文字) */
#theme-toggle {
    position: absolute;
    top: clamp(10px, 2vh, 20px);
    right: clamp(10px, 3vw, 30px);
    width: 42px;
    height: 42px;
    min-width: 42px;
    max-width: 42px;
    border-radius: 50%;
    border: 1px solid rgba(122, 162, 255, 0.2);
    background: rgba(11, 16, 32, 0.8);
    color: #fff;
    cursor: pointer;
    z-index: 100;
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    line-height: 1;
    padding: 0;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 0 20px rgba(122, 162, 255, 0.15), 0 4px 12px rgba(0, 0, 0, 0.2);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: clip;
}

#theme-toggle i {
    font-size: 18px;
    line-height: 1;
    margin: 0;
    pointer-events: none;
}

:root[data-theme="light"] #theme-toggle {
    background: rgba(255, 255, 255, 0.8);
    color: #333;
    border-color: #ddd;
}

#theme-toggle:hover {
    transform: scale(1.1) rotate(15deg);
    background: var(--accent2);
    box-shadow: 0 0 30px rgba(122, 162, 255, 0.4), 0 6px 20px rgba(0, 0, 0, 0.3);
}

/* Header */
header {
    padding: clamp(30px, 6vh, 50px) var(--container-padding) clamp(20px, 4vh, 30px);
    text-align: center;
    position: relative;
    max-width: var(--container-width);
    margin: 0 auto;
    width: 100%;
}

header h1 {
    font-size: clamp(32px, 6vw, 48px);
    margin: 0 0 12px;
    letter-spacing: 2px;
    background: linear-gradient(135deg, var(--text) 0%, var(--accent2) 50%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    filter: drop-shadow(0 2px 8px rgba(122, 162, 255, 0.15));
}

.glass-panel {
    width: 100%;
    background: rgba(20, 26, 51, 0.4);
    backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 20px;
    padding: clamp(20px, 4vw, 35px);
    box-shadow: inset 0 0 20px rgba(108, 242, 194, 0.03), 0 8px 30px rgba(0, 0, 0, 0.2);
    margin-top: 25px;
    position: relative;
    overflow: hidden;
    transition: all 0.5s var(--transition-smooth);
}

.glass-panel::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.15), transparent);
    pointer-events: none;
}

:root[data-theme="light"] .glass-panel {
    background: rgba(255, 255, 255, 0.6);
    border-color: rgba(0, 0, 0, 0.05);
}

.glass-panel p {
    color: var(--muted);
    font-size: clamp(14.5px, 2vw, 16px);
    line-height: 1.8;
    margin: 0;
}

:root[data-theme="light"] .glass-panel p {
    color: #475569;
}

.glass-panel strong {
    color: var(--text);
    font-weight: 700;
}

:root[data-theme="light"] .glass-panel strong {
    color: #1e293b;
}

.glass-panel i {
    color: var(--accent);
    margin-right: 5px;
}

.header-panel {
    text-align: center;
    padding: clamp(20px, 4vh, 30px) clamp(15px, 3vw, 40px);
}

.about-panel {
    display: grid;
    grid-template-columns: 1fr;
    gap: 25px;
    text-align: left;
}

.about-panel > div {
    display: flex;
    flex-direction: column;
    gap: 8px;
    transition: all 0.4s var(--transition-smooth);
    border-radius: 12px;
    padding: 16px;
    border: 1px solid transparent;
}

.about-panel > div:hover {
    background: rgba(122, 162, 255, 0.04);
    border-color: rgba(122, 162, 255, 0.08);
    transform: translateY(-3px);
}

@media (min-width: 768px) {
    .about-panel {
        grid-template-columns: repeat(3, 1fr);
        gap: 35px;
    }
}

/* Nav */
nav {
    position: sticky;
    top: 0;
    backdrop-filter: blur(16px);
    background: rgba(11, 16, 32, 0.6);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    z-index: 10;
    width: 100%;
}

:root[data-theme="light"] nav {
    background: rgba(255, 255, 255, 0.85);
    border-bottom-color: rgba(0, 0, 0, 0.05);
}

nav ul {
    display: flex;
    justify-content: center;
    gap: clamp(10px, 2vw, 25px);
    list-style: none;
    margin: 0 auto;
    padding: 12px var(--container-padding);
    flex-wrap: wrap;
    max-width: var(--container-width);
}

nav a {
    color: var(--text);
    text-decoration: none;
    font-weight: 600;
    padding: 8px 16px;
    border-radius: 12px;
    font-size: clamp(14px, 2vw, 15px);
    white-space: nowrap;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 185px;
    gap: 8px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.02);
    z-index: 1;
    overflow: hidden;
}

:root[data-theme="light"] nav a {
    background: rgba(0, 0, 0, 0.03);
}

nav a i {
    transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    font-size: 1.1em;
    color: var(--muted);
}

nav a:hover {
    color: var(--accent);
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.15);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2), inset 0 0 15px rgba(108, 242, 194, 0.15);
    transform: translateY(-2px);
}

nav a:hover i {
    transform: scale(1.15) translateY(-2px);
    color: var(--accent);
}

nav a:focus,
a:focus,
button:focus {
    outline: 2px solid var(--accent2);
    outline-offset: 2px;
}

/* Sections */
section {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: clamp(20px, 4vh, 40px) var(--container-padding);
    width: 100%;
}

section h2 {
    font-size: clamp(24px, 4vw, 32px);
    margin-bottom: clamp(10px, 2vh, 15px);
    border-left: 4px solid var(--accent2);
    padding-left: 12px;
    display: flex;
    align-items: center;
    gap: 10px;
    position: relative;
    padding-bottom: 8px;
}

section h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 12px;
    width: 40px;
    height: 2px;
    background: linear-gradient(90deg, var(--accent2), transparent);
    border-radius: 2px;
    opacity: 0.6;
}

/* Promo banner */
.promo-banner-container {
    max-width: var(--container-width);
    margin: 30px auto 0;
    padding: 0 var(--container-padding);
    width: 100%;
    z-index: 5;
    position: relative;
}

.promo-banner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: linear-gradient(135deg, rgba(255, 65, 108, 0.15), rgba(255, 75, 43, 0.15));
    border: 1px solid rgba(255, 65, 108, 0.3);
    border-radius: 12px;
    padding: 18px 24px;
    text-decoration: none;
    color: var(--text);
    transition: all 0.3s var(--transition-smooth);
    box-shadow: 0 4px 15px rgba(255, 65, 108, 0.1);
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(10px);
}

.promo-banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 50%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transform: skewX(-20deg);
    animation: shine 3.5s infinite;
}

@keyframes shine {
    0% { left: -100%; }
    20% { left: 200%; }
    100% { left: 200%; }
}

.promo-banner:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(255, 65, 108, 0.25);
    border-color: rgba(255, 65, 108, 0.6);
    background: linear-gradient(135deg, rgba(255, 65, 108, 0.25), rgba(255, 75, 43, 0.25));
}

.promo-badge {
    background: linear-gradient(90deg, #FF416C, #FF4B2B);
    color: #fff;
    padding: 4px 12px;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 800;
    margin-right: 15px;
    box-shadow: 0 2px 8px rgba(255, 65, 108, 0.4);
    white-space: nowrap;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.promo-content {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
}

.promo-text {
    font-size: clamp(14px, 1.5vw, 16px);
    line-height: 1.5;
}

.promo-text strong {
    color: #FF6B6B;
}

.promo-cta {
    font-weight: bold;
    color: #FF4B2B;
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 6px;
    margin-left: 15px;
    background: rgba(255, 65, 108, 0.1);
    padding: 8px 16px;
    border-radius: 30px;
    border: 1px solid rgba(255, 65, 108, 0.2);
    transition: all 0.3s ease;
}

.promo-banner:hover .promo-cta {
    background: rgba(255, 65, 108, 0.2);
    border-color: rgba(255, 65, 108, 0.4);
}

.promo-banner:hover .promo-cta i {
    transform: translateX(4px);
}

.promo-guides-box {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 30px;
    margin-top: 15px;
    background: linear-gradient(135deg, rgba(255, 65, 108, 0.08), rgba(255, 75, 43, 0.08));
    border: 1px solid rgba(255, 65, 108, 0.2);
    border-radius: 12px;
    padding: 16px 24px;
    box-shadow: 0 4px 15px rgba(255, 65, 108, 0.05);
    backdrop-filter: blur(10px);
    transition: all 0.3s var(--transition-smooth);
}

.promo-guides-box:hover {
    box-shadow: 0 8px 20px rgba(255, 65, 108, 0.15);
    border-color: rgba(255, 65, 108, 0.4);
}

.guide-link {
    color: var(--text);
    text-decoration: none;
    font-weight: 600;
    font-size: clamp(14px, 1.5vw, 15px);
    display: flex;
    align-items: center;
    gap: 10px;
    transition: all 0.3s ease;
}

.guide-link:hover {
    color: #FF4B2B;
    transform: translateY(-1px);
}

.guide-icon {
    background: rgba(255, 65, 108, 0.15);
    color: #FF416C;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    transition: background 0.3s ease;
}

.guide-link:hover .guide-icon {
    background: rgba(255, 65, 108, 0.25);
}

.guide-divider {
    width: 1px;
    height: 24px;
    background: rgba(255, 65, 108, 0.3);
}

:root[data-theme="light"] .promo-banner,
:root[data-theme="light"] .promo-guides-box {
    background: linear-gradient(135deg, rgba(255, 65, 108, 0.06), rgba(255, 75, 43, 0.06));
    border-color: rgba(255, 65, 108, 0.2);
    color: #333;
}

:root[data-theme="light"] .guide-link {
    color: #333;
}

:root[data-theme="light"] .guide-link:hover {
    color: #FF416C;
}

@media (max-width: 768px) {
    .promo-banner {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
        padding: 16px;
    }

    .promo-content {
        align-items: flex-start;
    }

    .promo-badge {
        margin-bottom: 8px;
    }

    .promo-text {
        width: 100%;
    }

    .promo-cta {
        margin-left: 0;
        align-self: flex-start;
        width: 100%;
        justify-content: center;
    }

    .promo-guides-box {
        flex-direction: column;
        gap: 15px;
        align-items: flex-start;
    }

    .guide-divider {
        display: none;
    }

    .guide-link {
        width: 100%;
    }
}

/* More link */
.more-link {
    margin-left: auto;
    font-size: clamp(14px, 1.8vw, 16px);
    color: var(--accent);
    text-decoration: none;
    font-weight: normal;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    border: 1px solid rgba(108, 242, 194, 0.3);
    padding: 6px 16px;
    border-radius: 30px;
    transition: all 0.3s ease;
    backdrop-filter: blur(4px);
}

.more-link:hover {
    background: rgba(108, 242, 194, 0.1);
    border-color: var(--accent);
    box-shadow: 0 4px 12px rgba(108, 242, 194, 0.15);
    transform: translateY(-1px);
}

.more-link:hover i {
    transform: translateX(3px);
}

:root[data-theme="light"] .more-link {
    border-color: rgba(0, 122, 61, 0.3);
    color: var(--subtitle-green);
}

/* Product grid */
.grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: clamp(16px, 3vw, 32px);
    margin-top: clamp(20px, 4vh, 30px);
}

@media (max-width: 768px) {
    .grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
}

@media (min-width: 1921px) {
    .grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.card {
    background: linear-gradient(180deg, #1a2044, var(--card));
    border: 1px solid rgba(122, 162, 255, 0.18);
    border-radius: clamp(12px, 2vw, 20px);
    padding: clamp(16px, 3vw, 24px);
    box-shadow: var(--shadow-card);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: all 0.5s var(--transition-smooth);
    height: 100%;
    position: relative;
    overflow: hidden;
    opacity: 0;
    animation: fadeInUp 0.7s var(--transition-smooth) forwards;
}

.card:hover {
    transform: translateY(-6px) scale(1.005);
    box-shadow: var(--shadow-card-hover), 0 0 30px rgba(108, 242, 194, 0.08);
    border-color: rgba(122, 162, 255, 0.3);
}

:root[data-theme="light"] .card {
    background: linear-gradient(180deg, #e6ebf5, var(--card));
}

.card:nth-child(1) { animation-delay: 0.05s; }
.card:nth-child(2) { animation-delay: 0.1s; }
.card:nth-child(3) { animation-delay: 0.15s; }
.card:nth-child(4) { animation-delay: 0.2s; }

.card h3 {
    margin-top: 0;
    font-size: clamp(18px, 3vw, 22px);
    word-break: break-word;
}

.card p {
    color: var(--muted);
    font-size: clamp(14px, 2vw, 16px);
    margin-bottom: 16px;
    line-height: 1.6;
    flex-grow: 1;
}

.tags {
    margin-bottom: 16px;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px;
}

.tags > span[style*="linear-gradient"] {
    margin-left: auto;
}

.tag {
    display: inline-block;
    background: rgba(108, 242, 194, 0.15);
    color: var(--subtitle-green);
    padding: 4px 12px;
    border-radius: 999px;
    font-size: clamp(11px, 1.5vw, 13px);
    margin: 0 6px 6px 0;
    transition: all 0.3s var(--transition-smooth);
    border: 1px solid rgba(108, 242, 194, 0.1);
}

:root[data-theme="light"] .tag {
    background: rgba(0, 122, 61, 0.15);
}

.btn {
    display: inline-block;
    text-align: center;
    padding: 8px 16px;
    border-radius: 30px;
    background: linear-gradient(90deg, var(--accent2) 0%, var(--accent) 100%);
    box-shadow: 0 6px 18px rgba(108, 242, 194, 0.25);
    color: #0b1020;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.4s var(--transition-smooth);
    font-size: clamp(13px, 2vw, 15px);
    border: none;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    background-size: 200% auto;
}

.btn.secondary {
    background: transparent;
    border: 1px solid rgba(122, 162, 255, 0.4);
    color: var(--text);
    box-shadow: none;
}

.btn:hover {
    opacity: 0.9;
    transform: translateY(-2px);
}

.btn:not(.secondary):hover {
    box-shadow: 0 8px 25px rgba(108, 242, 194, 0.35);
    background-position: right center;
}

/* 按钮 7:3 比例 */
.card .buttons {
    display: flex;
    flex-direction: row;
    flex-wrap: nowrap;
    gap: 10px;
    width: 100%;
    margin-top: auto;
    padding-top: 15px;
}

.card .buttons .btn {
    margin: 0 !important;
    display: flex;
    justify-content: center;
    align-items: center;
    box-sizing: border-box;
    padding: 8px 10px;
    font-size: clamp(12px, 1vw, 14px);
    white-space: normal;
    line-height: 1.3;
    min-width: 0;
}

.card .buttons .btn:first-child {
    flex: 7 1 0;
}

.card .buttons .btn:last-child {
    flex: 3 1 0;
}

.card .buttons .btn:only-child {
    flex: 1 1 100%;
}

/* Footer */
footer {
    text-align: center;
    padding: clamp(24px, 5vh, 40px) var(--container-padding);
    color: var(--muted);
    border-top: 1px solid rgba(122, 162, 255, 0.15);
    background: rgba(11, 16, 32, 0.6);
    margin-top: auto;
    width: 100%;
    position: relative;
}

:root[data-theme="light"] footer {
    background: rgba(255, 255, 255, 0.8);
    border-top-color: rgba(0, 0, 0, 0.08);
}

footer a {
    color: var(--accent2);
    text-decoration: underline;
    text-underline-offset: 2px;
    font-weight: 500;
}

:root[data-theme="light"] footer a {
    color: #0056b3;
}

footer a:hover {
    color: var(--accent);
    text-decoration: none;
}

footer a.footer-highlight {
    color: var(--accent);
    font-weight: 600;
    text-decoration: none;
}

:root[data-theme="light"] footer a.footer-highlight {
    color: #007a3d;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 768px) {
    .card .buttons .btn {
        font-size: 12px;
        padding: 8px 6px;
    }

    .card .buttons .btn:first-child {
        flex: 7 1 0;
    }

    .card .buttons .btn:last-child {
        flex: 3 1 0;
    }

    .card .buttons .btn:only-child {
        flex: 1 1 100%;
    }

    nav ul {
        gap: 20px;
        padding: 6px 18px;
    }

    nav ul li {
        width: calc(50% - 15px);
        display: flex;
    }

    nav a {
        width: 100%;
        font-size: 13px;
        padding: 10px 0;
        justify-content: center;
    }
}

@media (min-width: 2560px) {
    :root {
        --container-width: 1800px;
    }

    body {
        font-size: 18px;
    }

    .card {
        padding: 32px;
    }
}