/* ==========================================================================
   index.css  —  主頁專屬樣式（對應 index.html / index.js）
   僅本頁使用；共用部分請見 common.css
   ========================================================================== */

/* ---------- Hero ------------------------------------------------------- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: var(--nav-h);
    background: transparent;   /* 讓固定的三角網格背景透出 */
    overflow: hidden;
}

.hero__inner { position: relative; z-index: 2; }

.hero__title {
    font-size: clamp(52px, 11vw, 132px);
    font-weight: 800;
    line-height: 0.92;
    letter-spacing: -0.045em;
}
/* .ink-box 已移至 common.css（全站共用） */

.hero__sub {
    margin-top: 32px;
    font-size: clamp(17px, 2.2vw, 22px);
    color: var(--muted);
    line-height: 1.55;
}

.hero__cta {
    margin-top: 44px;
    display: flex;
    align-items: center;
    gap: 28px;
    flex-wrap: wrap;
}

/* 向下捲動提示（移到右下角，避免與左側委託按鈕重疊） */
.hero__scroll {
    position: absolute;
    right: var(--edge); bottom: 28px;
    left: auto;
    z-index: 2;
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 12px;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--c-silver);
}
.hero__scroll span {
    width: 34px; height: 1px;
    background: var(--c-silver);
    position: relative;
    overflow: hidden;
}
.hero__scroll span::after {
    content: "";
    position: absolute; inset: 0;
    background: var(--c-ink);
    transform: translateX(-100%);
    animation: scrollLine 2.4s var(--ease) infinite;
}
@keyframes scrollLine {
    0% { transform: translateX(-100%); }
    50% { transform: translateX(0); }
    100% { transform: translateX(100%); }
}

/* 繪畫 / 語言 / 光暗 三個網格三角按鈕已統一移至 common.css（.gtri）+ common.js（makeTriBtn）。 */
/* 三角網格背景已移至 common.css / common.js（#triCanvas），全站共用、固定不捲動。 */

/* ---------- 三大原則 -------------------------------------------------- */
.principles { background: transparent; }
.principles__head { max-width: 720px; margin-bottom: 64px; }

.principles__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.p-card {
    padding: 40px 32px;
    background: transparent;
    border-radius: var(--radius);
    border: 1px solid var(--line);
    transition: transform 0.4s var(--ease), border-color 0.4s var(--ease);
}
.p-card:hover {
    transform: translateY(-6px);
    border-color: var(--c-ink);
}
.p-card__mark {
    width: 56px; height: 56px;
    display: grid; place-items: center;
    margin-bottom: 28px;
    color: var(--c-ink);                 /* SVG 圖示用 currentColor，隨主題黑白反轉 */
}
.p-card__mark svg { width: 44px; height: 44px; display: block; }
.m-square { width: 34px; height: 34px; background: var(--c-ink); }
.m-circle { width: 38px; height: 38px; border-radius: 50%; background: var(--c-ink); }
.m-tri {
    width: 0; height: 0;
    border-left: 20px solid transparent;
    border-right: 20px solid transparent;
    border-bottom: 36px solid var(--c-ink);
}
.p-card h3 { font-size: 22px; font-weight: 700; margin-bottom: 12px; }
.p-card p { color: var(--muted); font-size: 15px; line-height: 1.6; }

/* ---------- 精選展示 -------------------------------------------------- */
.showcase { background: transparent; }
.showcase__head {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    margin-bottom: 48px;
    gap: 24px;
}
.showcase__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}
.s-card {
    position: relative;
    z-index: 1;                 /* 這四張是滿版圖片卡（不透明），壓在右上角三角鈕(.gtri=50)之下，
                                   避免蓋住語言/光暗切換鈕；覆蓋 common.css 毛玻璃群組的 --z-card(100) */
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 340px;
    padding: 30px;
    border-radius: var(--radius);
    border: 1px solid var(--line);
    overflow: hidden;
    color: #fff;                        /* 概念圖上一律白字 */
    transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease);
}
.s-card:hover { transform: translateY(-6px); box-shadow: 0 24px 60px rgba(0,0,0,0.25); }

/* 概念圖：彩色鋪滿；光明模式正常亮度、深色模式才變暗；hover 微放大 */
.s-card__img {
    position: absolute; inset: 0; z-index: 0;
    width: 100%; height: 100%;
    object-fit: cover;
    filter: none;                      /* 光明模式：彩色、正常亮度 */
    transition: transform 0.6s var(--ease), filter 0.4s var(--ease);
}
:root[data-theme="dark"] .s-card__img { filter: brightness(0.6); }   /* 深色模式：照片變暗 */
.s-card:hover .s-card__img { transform: scale(1.05); }

/* 漸層遮罩：只壓暗底部（放文字處），上半保持照片明亮 */
.s-card::after {
    content: "";
    position: absolute; inset: 0; z-index: 1;
    background: linear-gradient(180deg,
        rgba(0,0,0,0) 32%, rgba(0,0,0,0.40) 100%);
}

.s-card__tag {
    align-self: flex-start;
    position: relative; z-index: 2;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.06em;
    padding: 5px 12px;
    border-radius: 980px;
    background: rgba(0,0,0,0.42);        /* 深色膠囊，明亮照片上也讀得清 */
    color: #fff;
    -webkit-backdrop-filter: blur(6px);
    backdrop-filter: blur(6px);
}
.s-card__tag--accent { background: rgba(255,255,255,0.92); color: #111; }

.s-card__text { position: relative; z-index: 2; }
.s-card__text h3 { font-size: 26px; font-weight: 700; color: #fff; }
.s-card__text p { font-size: 15px; color: rgba(255,255,255,0.82); margin-top: 4px; }

/* ---------- 數據帶 ---------------------------------------------------- */
.stats { background: transparent; color: inherit; padding: 80px 0; }
.stats__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    text-align: center;
}
.stat b {
    display: block;
    font-size: clamp(40px, 6vw, 68px);
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1;
}
.stat span { font-size: 14px; color: var(--muted); margin-top: 10px; display: block; }

/* ---------- CTA ------------------------------------------------------- */
.cta { background: transparent; padding: 120px 0; }
.cta .cta__inner {          /* 加高權重，確保覆蓋滿版的 .wrap */
    text-align: center;
    max-width: 720px;
    margin-inline: auto;    /* 置中 */
    padding: 72px 40px;
    background: transparent;
    border-radius: 28px;
    border: 1px solid var(--c-ink);
}
.cta__inner h2 {
    font-size: clamp(28px, 4vw, 44px);
    font-weight: 700;
    letter-spacing: -0.02em;
}
.cta__inner p { color: var(--muted); margin: 16px 0 32px; font-size: 18px; }

/* ---------- 響應式 ---------------------------------------------------- */
@media (max-width: 860px) {
    .principles__grid { grid-template-columns: 1fr; }
    .showcase__grid { grid-template-columns: 1fr; }
    .stats__grid { grid-template-columns: repeat(2, 1fr); gap: 40px 24px; }
}
@media (max-width: 520px) {
    .hero__scroll { display: none; }
    .showcase__head { flex-direction: column; align-items: flex-start; }
}