/* ==================== 变量 ==================== */
:root {
    --hue: 220;
    --primary-color: hsl(var(--hue), 80%, 55%);
    --primary-color-alt: hsl(var(--hue), 80%, 45%);
    --title-color: hsl(var(--hue), 40%, 10%);
    --text-color: hsl(var(--hue), 15%, 35%);
    --text-color-light: hsl(var(--hue), 15%, 55%);
    --body-color: hsl(var(--hue), 30%, 98%);
    --container-color: hsl(0, 0%, 100%);
    --border-color: hsl(var(--hue), 20%, 90%);
    --shadow-color: hsla(var(--hue), 40%, 10%, 0.08);
    
    --body-font: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    --biggest-font-size: 3rem;
    --h1-font-size: 2.25rem;
    --h2-font-size: 1.75rem;
    --h3-font-size: 1.25rem;
    --normal-font-size: 1rem;
    --small-font-size: 0.875rem;
    --smaller-font-size: 0.813rem;
    
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;
    
    --header-height: 4rem;
    --section-padding: 6rem;
    --border-radius: 0.75rem;
    --transition: all 0.3s ease;
}

/* 暗色主题 */
.dark-theme {
    --title-color: hsl(var(--hue), 20%, 95%);
    --text-color: hsl(var(--hue), 15%, 70%);
    --text-color-light: hsl(var(--hue), 15%, 55%);
    --body-color: hsl(var(--hue), 20%, 8%);
    --container-color: hsl(var(--hue), 18%, 12%);
    --border-color: hsl(var(--hue), 15%, 22%);
    --shadow-color: hsla(var(--hue), 40%, 5%, 0.3);
}

/* ==================== 基础重置 ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--body-font);
    font-size: var(--normal-font-size);
    background-color: var(--body-color);
    color: var(--text-color);
    line-height: 1.7;
    transition: background-color 0.3s ease, color 0.3s ease;
}

h1, h2, h3 {
    color: var(--title-color);
    font-weight: var(--font-bold);
    line-height: 1.2;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

button {
    border: none;
    outline: none;
    background: none;
    cursor: pointer;
    font-family: inherit;
}

/* ==================== 布局 ==================== */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.grid {
    display: grid;
    gap: 2rem;
}

.section {
    padding: var(--section-padding) 0;
}

.section__subtitle {
    display: block;
    color: var(--primary-color);
    font-size: var(--smaller-font-size);
    font-weight: var(--font-semibold);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 0.75rem;
}

.section__title {
    font-size: var(--h2-font-size);
    margin-bottom: 3rem;
}

/* ==================== 按钮 ==================== */
.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 1.75rem;
    border-radius: 0.5rem;
    font-weight: var(--font-semibold);
    font-size: var(--small-font-size);
    transition: var(--transition);
}

.button--primary {
    background-color: var(--primary-color);
    color: #fff;
}

.button--primary:hover {
    background-color: var(--primary-color-alt);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px hsla(var(--hue), 80%, 55%, 0.3);
}

.button--ghost {
    border: 1.5px solid var(--border-color);
    color: var(--title-color);
}

.button--ghost:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-2px);
}

.button--large {
    padding: 1rem 2.5rem;
    font-size: var(--normal-font-size);
}

/* ==================== 导航栏 ==================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background-color: transparent;
    z-index: 1000;
    transition: var(--transition);
}

.header--scroll {
    background-color: var(--container-color);
    box-shadow: 0 1px 10px var(--shadow-color);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.nav__logo-text {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    background-color: var(--primary-color);
    color: #fff;
    border-radius: 0.5rem;
    font-weight: var(--font-bold);
    font-size: 1.1rem;
}

.nav__menu {
    display: flex;
    gap: 2.5rem;
}

.nav__link {
    color: var(--title-color);
    font-size: var(--small-font-size);
    font-weight: var(--font-medium);
    position: relative;
    transition: var(--transition);
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: var(--transition);
}

.nav__link:hover,
.nav__link.active-link {
    color: var(--primary-color);
}

.nav__link:hover::after,
.nav__link.active-link::after {
    width: 100%;
}

.nav__actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.theme-toggle {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--title-color);
    background-color: var(--body-color);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.theme-toggle:hover {
    background-color: var(--border-color);
}

.theme-toggle__icon--sun {
    display: none;
}

.dark-theme .theme-toggle__icon--sun {
    display: block;
}

.dark-theme .theme-toggle__icon--moon {
    display: none;
}

.nav__toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 0.25rem;
}

.nav__toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--title-color);
    transition: var(--transition);
}

/* ==================== 首页 Hero ==================== */
.home {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: var(--header-height);
}

.home__container {
    grid-template-columns: 1.2fr 1fr;
    align-items: center;
}

.home__greeting {
    font-size: var(--normal-font-size);
    color: var(--text-color-light);
    margin-bottom: 0.5rem;
}

.home__title {
    font-size: var(--biggest-font-size);
    margin-bottom: 0.5rem;
}

.home__subtitle {
    font-size: var(--h3-font-size);
    color: var(--text-color);
    font-weight: var(--font-medium);
    margin-bottom: 1.25rem;
}

.home__separator {
    color: var(--primary-color);
}

.home__description {
    font-size: 1.1rem;
    max-width: 460px;
    margin-bottom: 2rem;
    color: var(--text-color);
}

.home__buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 2.5rem;
}

.home__social {
    display: flex;
    gap: 1rem;
}

.home__social a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    color: var(--text-color);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.home__social a:hover {
    color: var(--primary-color);
    border-color: var(--primary-color);
    transform: translateY(-3px);
}

.home__image {
    display: flex;
    justify-content: center;
}

.home__image-wrapper {
    position: relative;
    width: 320px;
    height: 320px;
}

.home__image-wrapper::before {
    content: '';
    position: absolute;
    inset: -10px;
    border: 2px solid var(--primary-color);
    border-radius: 1.5rem;
    transform: rotate(6deg);
    opacity: 0.3;
    z-index: -1;
}

.home__image-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 1.5rem;
    box-shadow: 0 20px 40px var(--shadow-color);
}

/* ==================== 关于 ==================== */
.about__grid {
    grid-template-columns: 1.2fr 1fr;
    align-items: start;
}

.about__text {
    margin-bottom: 1.25rem;
    font-size: 1.05rem;
}

.about__skills {
    background-color: var(--container-color);
    padding: 2rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.about__skills-title {
    font-size: var(--h3-font-size);
    margin-bottom: 1.25rem;
}

.about__tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.about__tag {
    padding: 0.5rem 1rem;
    background-color: var(--body-color);
    border: 1px solid var(--border-color);
    border-radius: 2rem;
    font-size: var(--small-font-size);
    color: var(--title-color);
    transition: var(--transition);
}

.about__tag:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-2px);
}

/* ==================== 作品 ==================== */
.works {
    background-color: var(--container-color);
}

.works__grid {
    grid-template-columns: repeat(3, 1fr);
}

.work__card {
    background-color: var(--body-color);
    border-radius: var(--border-radius);
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.work__card:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 40px var(--shadow-color);
}

.work__image {
    overflow: hidden;
    aspect-ratio: 16 / 10;
}

.work__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.work__card:hover .work__image img {
    transform: scale(1.05);
}

.work__content {
    padding: 1.5rem;
}

.work__title {
    font-size: var(--h3-font-size);
    margin-bottom: 0.75rem;
}

.work__description {
    font-size: var(--small-font-size);
    margin-bottom: 1rem;
    color: var(--text-color);
    line-height: 1.6;
}

.work__tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.25rem;
}

.work__tags span {
    padding: 0.25rem 0.625rem;
    background-color: var(--container-color);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    font-size: var(--smaller-font-size);
    color: var(--text-color-light);
}

.work__link {
    color: var(--primary-color);
    font-weight: var(--font-semibold);
    font-size: var(--small-font-size);
    transition: var(--transition);
}

.work__link:hover {
    color: var(--primary-color-alt);
}

/* ==================== 博客 ==================== */
.blog__grid {
    grid-template-columns: repeat(3, 1fr);
}

.blog__card {
    padding: 2rem;
    background-color: var(--container-color);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.blog__card:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 32px var(--shadow-color);
}

.blog__category {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background-color: hsla(var(--hue), 80%, 55%, 0.1);
    color: var(--primary-color);
    border-radius: 1rem;
    font-size: var(--smaller-font-size);
    font-weight: var(--font-semibold);
    margin-bottom: 1rem;
    align-self: flex-start;
}

.blog__title {
    font-size: var(--h3-font-size);
    margin-bottom: 0.75rem;
    line-height: 1.3;
}

.blog__excerpt {
    font-size: var(--small-font-size);
    color: var(--text-color);
    margin-bottom: 1.25rem;
    flex: 1;
}

.blog__meta {
    display: flex;
    gap: 1rem;
    font-size: var(--smaller-font-size);
    color: var(--text-color-light);
    margin-bottom: 1.25rem;
}

.blog__link {
    color: var(--primary-color);
    font-weight: var(--font-semibold);
    font-size: var(--small-font-size);
    transition: var(--transition);
}

.blog__link:hover {
    color: var(--primary-color-alt);
}

/* ==================== 联系 ==================== */
.contact {
    text-align: center;
    background-color: var(--container-color);
}

.contact__container {
    max-width: 600px;
}

.contact__description {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    color: var(--text-color);
}

.contact__social {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 2.5rem;
}

.contact__social a {
    color: var(--text-color-light);
    font-size: var(--small-font-size);
    font-weight: var(--font-medium);
    transition: var(--transition);
}

.contact__social a:hover {
    color: var(--primary-color);
}

/* ==================== 页脚 ==================== */
.footer {
    padding: 2rem 0;
    border-top: 1px solid var(--border-color);
    background-color: var(--body-color);
}

.footer__container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer__copy,
.footer__credit {
    font-size: var(--smaller-font-size);
    color: var(--text-color-light);
}

/* ==================== 响应式 ==================== */
@media screen and (max-width: 992px) {
    :root {
        --biggest-font-size: 2.5rem;
        --h1-font-size: 2rem;
        --h2-font-size: 1.5rem;
        --section-padding: 5rem;
    }

    .home__container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 3rem;
    }

    .home__description {
        margin-left: auto;
        margin-right: auto;
    }

    .home__buttons,
    .home__social {
        justify-content: center;
    }

    .home__image-wrapper {
        width: 280px;
        height: 280px;
    }

    .about__grid,
    .works__grid,
    .blog__grid {
        grid-template-columns: 1fr;
    }
}

@media screen and (max-width: 768px) {
    :root {
        --biggest-font-size: 2rem;
        --section-padding: 4rem;
    }

    .nav__menu {
        position: fixed;
        top: var(--header-height);
        left: 0;
        width: 100%;
        background-color: var(--container-color);
        flex-direction: column;
        align-items: center;
        padding: 2rem 0;
        gap: 1.5rem;
        box-shadow: 0 10px 20px var(--shadow-color);
        transform: translateY(-150%);
        opacity: 0;
        transition: var(--transition);
        z-index: 999;
    }

    .nav__menu.show-menu {
        transform: translateY(0);
        opacity: 1;
    }

    .nav__toggle {
        display: flex;
    }

    .nav__toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .nav__toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav__toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    .home__buttons {
        flex-direction: column;
        align-items: center;
    }

    .footer__container {
        flex-direction: column;
        gap: 0.5rem;
        text-align: center;
    }
}

/* ==================== 动画 ==================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.home__content > *,
.about__grid > *,
.work__card,
.blog__card {
    animation: fadeInUp 0.6s ease forwards;
}

/* ==================== 近期热点 ==================== */
.recent-hotspots {
    background-color: var(--container-color);
}

.recent-hotspots__search {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 2.5rem;
    max-width: 500px;
}

.recent-hotspots__search input {
    flex: 1;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    font-size: var(--normal-font-size);
    font-family: inherit;
    outline: none;
    background: var(--body-color);
    color: var(--text-color);
}

.recent-hotspots__search input:focus {
    border-color: var(--primary-color);
}

.button--small {
    padding: 0.625rem 1.25rem;
    font-size: var(--small-font-size);
}

.recent-hotspots__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.recent-hotspots__loading,
.recent-hotspots__empty,
.recent-hotspots__error {
    grid-column: 1 / -1;
    text-align: center;
    padding: 3rem;
    color: var(--text-color-light);
}

.recent-hotspots__error {
    color: #e74c3c;
}

.recent-hotspot__card {
    background-color: var(--body-color);
    border-radius: var(--border-radius);
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    height: 100%;
    cursor: pointer;
}

.recent-hotspot__card:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 32px var(--shadow-color);
}

.recent-hotspot__image {
    width: 100%;
    aspect-ratio: 16 / 10;
    overflow: hidden;
    background-color: var(--border-color);
}

.recent-hotspot__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.recent-hotspot__card:hover .recent-hotspot__image img {
    transform: scale(1.05);
}

.recent-hotspot__content {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.recent-hotspot__tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.recent-hotspot__tags span {
    padding: 0.25rem 0.75rem;
    background-color: hsla(var(--hue), 80%, 55%, 0.1);
    color: var(--primary-color);
    border-radius: 1rem;
    font-size: var(--smaller-font-size);
    font-weight: var(--font-semibold);
}

.recent-hotspot__title {
    font-size: var(--h3-font-size);
    margin-bottom: 0.75rem;
    line-height: 1.3;
    color: var(--title-color);
}

.recent-hotspot__summary {
    font-size: var(--small-font-size);
    color: var(--text-color);
    margin-bottom: 1.25rem;
    flex: 1;
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.recent-hotspot__meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: var(--smaller-font-size);
    color: var(--text-color-light);
}

.recent-hotspot__pinned {
    color: var(--primary-color);
    font-weight: var(--font-semibold);
}

/* ==================== 文章详情页 ==================== */
.article-page {
    padding-top: var(--header-height);
    min-height: 100vh;
}

.article-detail {
    max-width: 800px;
    padding-top: 4rem;
    padding-bottom: 6rem;
}

.article-detail__loading,
.article-detail__error {
    text-align: center;
    padding: 4rem 0;
    color: var(--text-color-light);
}

.article-detail__error {
    color: #e74c3c;
}

.article-detail__cover {
    width: 100%;
    aspect-ratio: 16 / 9;
    border-radius: var(--border-radius);
    overflow: hidden;
    margin-bottom: 2rem;
    background-color: var(--border-color);
}

.article-detail__cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.article-detail__content h1 {
    font-size: var(--h1-font-size);
    margin-bottom: 1rem;
    line-height: 1.3;
}

.article-detail__meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
    font-size: var(--small-font-size);
    color: var(--text-color-light);
    flex-wrap: wrap;
}

.article-detail__tags {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.article-detail__tags span {
    padding: 0.25rem 0.75rem;
    background-color: hsla(var(--hue), 80%, 55%, 0.1);
    color: var(--primary-color);
    border-radius: 1rem;
    font-size: var(--smaller-font-size);
    font-weight: var(--font-semibold);
}

.article-detail__body {
    font-size: var(--normal-font-size);
    line-height: 1.8;
    color: var(--text-color);
}

.article-detail__body h2,
.article-detail__body h3 {
    color: var(--title-color);
    margin-top: 2rem;
    margin-bottom: 1rem;
}

.article-detail__body p {
    margin-bottom: 1.25rem;
}

.article-detail__body img,
.article-detail__body video {
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius);
    margin: 1.5rem 0;
}

.article-detail__body audio {
    width: 100%;
    margin: 1.5rem 0;
}

.article-detail__body blockquote {
    border-left: 4px solid var(--primary-color);
    padding-left: 1rem;
    margin: 1.5rem 0;
    color: var(--text-color-light);
}

.article-detail__body ul,
.article-detail__body ol {
    margin: 1rem 0 1.5rem 1.5rem;
}

.article-detail__body li {
    margin-bottom: 0.5rem;
}

.hidden {
    display: none !important;
}

@media screen and (max-width: 992px) {
    .recent-hotspots__grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media screen and (max-width: 576px) {
    .recent-hotspots__grid {
        grid-template-columns: 1fr;
    }

    .recent-hotspots__search {
        flex-direction: column;
    }
}

/* ==================== 每日热点 ==================== */
.daily-hot {
    background-color: var(--container-color);
}

.daily-hot__description {
    max-width: 600px;
    margin-bottom: 2.5rem;
    color: var(--text-color);
}

.daily-hot__grid {
    grid-template-columns: repeat(3, 1fr);
}

.daily-hot__card {
    background-color: var(--body-color);
    border-radius: var(--border-radius);
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.daily-hot__card:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 32px var(--shadow-color);
}

.daily-hot__image {
    width: 100%;
    aspect-ratio: 16 / 10;
    overflow: hidden;
    background-color: var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
}

.daily-hot__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.daily-hot__card:hover .daily-hot__image img {
    transform: scale(1.05);
}

.daily-hot__file-icon {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--text-color-light);
    gap: 0.5rem;
}

.daily-hot__file-icon svg {
    width: 48px;
    height: 48px;
}

.daily-hot__content {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.daily-hot__date {
    font-size: var(--smaller-font-size);
    color: var(--text-color-light);
    margin-bottom: 0.5rem;
}

.daily-hot__title {
    font-size: var(--h3-font-size);
    margin-bottom: 0.75rem;
    line-height: 1.3;
}

.daily-hot__text {
    font-size: var(--small-font-size);
    color: var(--text-color);
    margin-bottom: 1.25rem;
    flex: 1;
    line-height: 1.6;
}

.daily-hot__link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-color);
    font-weight: var(--font-semibold);
    font-size: var(--small-font-size);
    transition: var(--transition);
}

.daily-hot__link:hover {
    color: var(--primary-color-alt);
}

.daily-hot__loading,
.daily-hot__error {
    grid-column: 1 / -1;
    text-align: center;
    padding: 3rem;
    color: var(--text-color-light);
}

.daily-hot__error {
    color: #e74c3c;
}

@media screen and (max-width: 992px) {
    .daily-hot__grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media screen and (max-width: 576px) {
    .daily-hot__grid {
        grid-template-columns: 1fr;
    }
}

/* ==================== 每日热点 iframe ==================== */
.daily-hot__iframe-wrapper {
    width: 100%;
    border-radius: var(--border-radius);
    overflow: hidden;
    border: 1px solid var(--border-color);
    background-color: var(--container-color);
    box-shadow: 0 4px 12px var(--shadow-color);
}

.daily-hot__iframe-wrapper iframe {
    width: 100%;
    height: 800px;
    border: none;
    display: block;
}

@media screen and (max-width: 768px) {
    .daily-hot__iframe-wrapper iframe {
        height: 600px;
    }
}