/*
 * Payload IR 公開站樣式
 *
 * 設計依據：客戶提供之 示意圖.jpg / 示意圖2.jpg
 * 風格：暗色科技 / 軍工，含 HUD 元素、橘色強調 (FOR MISSION-CRITICAL APPLICATIONS)
 *
 * 色票：
 *   --pir-bg-deep    深底 #07090E
 *   --pir-bg         主背景 #0B1220
 *   --pir-bg-alt     交替背景 #0E1622
 *   --pir-surface    卡片底 #10141C
 *   --pir-text       主要文字 #E6E9EE
 *   --pir-text-mute  次要文字 #A6ADBA
 *   --pir-border     邊框 rgba(255,255,255,0.08)
 *   --pir-accent     橘色強調 #FF7A1A
 *   --pir-accent-2   橘色 hover #FF9148
 */

:root {
    --pir-bg-deep: #07090E;
    --pir-bg: #0B1220;
    --pir-bg-alt: #0E1622;
    --pir-surface: #10141C;
    --pir-text: #E6E9EE;
    --pir-text-mute: #A6ADBA;
    --pir-border: rgba(255, 255, 255, 0.08);
    --pir-border-strong: rgba(255, 255, 255, 0.18);
    --pir-accent: #FF7A1A;
    --pir-accent-2: #FF9148;
    --pir-hud: rgba(255, 255, 255, 0.45);
    --pir-container-max: 1320px;
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
    margin: 0;
    font-family: "Inter", "Helvetica Neue", "Segoe UI", "Noto Sans TC", system-ui, -apple-system, sans-serif;
    background: var(--pir-bg);
    color: var(--pir-text);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

a { color: inherit; }

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

/* ─────────────── Layout ─────────────── */

.pir-container {
    max-width: var(--pir-container-max);
    margin: 0 auto;
    padding: 0 7%;
}

.pir-section {
    padding: 110px 0;
    position: relative;
    overflow: hidden;
}

@media (max-width: 900px) {
    .pir-section { padding: 64px 0; }
    .pir-container { padding: 0 6%; }
}

/* ─────────────── Nav ─────────────── */

.pir-nav {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(7, 9, 14, 0.85);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--pir-border);
}

.pir-nav-inner {
    max-width: var(--pir-container-max);
    margin: 0 auto;
    padding: 18px 7%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
}

.pir-brand {
    display: flex;
    align-items: center;
    gap: 14px;
    text-decoration: none;
    color: #fff;
}

.pir-brand-logo {
    height: 40px;
    width: auto;
    max-width: 200px;
    object-fit: contain;
    display: block;
}

.pir-brand-mark {
    width: 42px;
    height: 42px;
    position: relative;
    display: inline-block;
    border: 1.5px solid var(--pir-accent);
    border-radius: 50%;
    flex-shrink: 0;
}

.pir-brand-mark::before,
.pir-brand-mark::after {
    content: "";
    position: absolute;
    background: var(--pir-accent);
}

.pir-brand-mark::before {
    left: 50%;
    top: 6px;
    bottom: 6px;
    width: 1px;
    transform: translateX(-0.5px);
}

.pir-brand-mark::after {
    top: 50%;
    left: 6px;
    right: 6px;
    height: 1px;
    transform: translateY(-0.5px);
}

.pir-brand-mark-cross {
    position: absolute;
    inset: 13px;
    border: 1px solid var(--pir-accent);
    border-radius: 50%;
}

.pir-brand-text {
    display: flex;
    flex-direction: column;
    line-height: 1.1;
}

.pir-brand-name {
    font-size: 19px;
    font-weight: 700;
    letter-spacing: 3px;
}

.pir-brand-name-accent {
    color: var(--pir-accent);
}

.pir-brand-sub {
    font-size: 10px;
    letter-spacing: 4px;
    color: var(--pir-text-mute);
    margin-top: 3px;
}

.pir-menu {
    display: flex;
    gap: 32px;
}

.pir-menu-link {
    color: #D6DAE2;
    text-decoration: none;
    font-size: 12px;
    letter-spacing: 2.5px;
    font-weight: 500;
    transition: color 0.2s;
    position: relative;
    padding: 4px 0;
}

.pir-menu-link:hover { color: var(--pir-accent); }

.pir-menu-link::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 0;
    height: 1px;
    background: var(--pir-accent);
    transition: width 0.2s;
}

.pir-menu-link:hover::after { width: 100%; }

@media (max-width: 900px) {
    .pir-menu { display: none; }
}

/* ─────────────── 共用標題 / 強調列 ─────────────── */

.pir-section-title {
    font-size: 42px;
    margin: 0 0 18px;
    letter-spacing: -0.5px;
    font-weight: 700;
}

.pir-section-sub {
    color: var(--pir-text-mute);
    max-width: 880px;
    font-size: 17px;
    margin: 0 0 56px;
}

/* 橘色強調列 (FOR MISSION-CRITICAL APPLICATIONS) — 示意圖 2 是橘色塊 */
.pir-accent {
    display: inline-block;
    background: var(--pir-accent);
    color: var(--pir-bg);
    font-weight: 800;
    letter-spacing: 3px;
    font-size: 13px;
    padding: 8px 14px;
    margin: 0 0 22px;
}

/* ─────────────── Hero (HUD) ─────────────── */

.pir-hero-hud {
    min-height: 92vh;
    display: flex;
    align-items: center;
    background-size: cover;
    background-position: center;
    padding: 140px 0 110px;
}

.pir-hero-hud-content { position: relative; z-index: 2; max-width: 920px; }

.pir-hero-title {
    font-size: 68px;
    line-height: 1.05;
    margin: 0 0 26px;
    font-weight: 800;
    letter-spacing: -1px;
    text-transform: uppercase;
}

.pir-hero-lead {
    max-width: 680px;
    font-size: 18px;
    color: #C7CCD5;
    margin: 0 0 38px;
}

/* HUD 視覺裝飾 */
.pir-hud {
    position: absolute;
    inset: 28px;
    pointer-events: none;
    z-index: 1;
}

.pir-hud-corner {
    position: absolute;
    width: 44px;
    height: 44px;
    border: 1px solid var(--pir-hud);
}
.pir-hud-corner-tl { top: 0;    left: 0;    border-right: 0; border-bottom: 0; }
.pir-hud-corner-tr { top: 0;    right: 0;   border-left: 0;  border-bottom: 0; }
.pir-hud-corner-bl { bottom: 0; left: 0;    border-right: 0; border-top: 0; }
.pir-hud-corner-br { bottom: 0; right: 0;   border-left: 0;  border-top: 0; }

.pir-hud-tickbar {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 56px;
    color: rgba(255, 255, 255, 0.55);
    font-size: 11px;
    letter-spacing: 1px;
}

.pir-hud-tickbar li {
    position: relative;
    padding-left: 18px;
}

.pir-hud-tickbar li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    width: 10px;
    height: 1px;
    background: rgba(255, 255, 255, 0.45);
}

.pir-hud-readout {
    position: absolute;
    top: 12px;
    right: 12px;
    display: flex;
    gap: 18px;
    color: rgba(255, 255, 255, 0.65);
    font-size: 11px;
    letter-spacing: 3px;
    align-items: center;
    text-transform: uppercase;
}

.pir-hud-crosshair {
    position: relative;
    display: inline-block;
    width: 70px;
    height: 70px;
    margin-left: 10px;
}

.pir-hud-crosshair-frame {
    position: absolute;
    inset: 0;
    border: 1px solid rgba(255, 255, 255, 0.4);
}

.pir-hud-crosshair::before,
.pir-hud-crosshair::after {
    content: "";
    position: absolute;
    background: rgba(255, 255, 255, 0.5);
}

.pir-hud-crosshair::before {
    left: 50%;
    top: 28%;
    bottom: 28%;
    width: 1px;
    transform: translateX(-0.5px);
}

.pir-hud-crosshair::after {
    top: 50%;
    left: 28%;
    right: 28%;
    height: 1px;
    transform: translateY(-0.5px);
}

@media (max-width: 900px) {
    .pir-hero-hud { min-height: 70vh; padding: 96px 0 64px; }
    .pir-hero-title { font-size: 38px; }
    .pir-hud-tickbar { display: none; }
    .pir-hud-readout { gap: 8px; font-size: 9px; }
    .pir-hud-crosshair { width: 44px; height: 44px; }
}

/* ─────────────── Buttons ─────────────── */

.pir-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
}

.pir-btn {
    display: inline-block;
    padding: 15px 30px;
    text-decoration: none;
    font-size: 12px;
    letter-spacing: 2.5px;
    font-weight: 700;
    transition: all 0.2s;
    border: 1px solid transparent;
    text-transform: uppercase;
}

.pir-btn-primary {
    background: var(--pir-accent);
    color: var(--pir-bg);
}

.pir-btn-primary:hover {
    background: var(--pir-accent-2);
}

.pir-btn-secondary {
    border-color: var(--pir-border-strong);
    color: #fff;
}

.pir-btn-secondary:hover {
    border-color: var(--pir-accent);
    color: var(--pir-accent);
}

/* ─────────────── Capability Tags (About) ─────────────── */

.pir-capability-text {
    max-width: 980px;
    font-size: 17px;
    color: #C7CCD5;
}

.pir-capability-text p { margin: 0 0 22px; }

.pir-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 40px;
}

.pir-tag {
    padding: 13px 18px;
    background: var(--pir-surface);
    border: 1px solid var(--pir-border);
    font-size: 12px;
    letter-spacing: 1.8px;
    color: #C7CCD5;
    font-weight: 500;
    transition: border-color 0.2s, color 0.2s;
}

.pir-tag:hover {
    border-color: var(--pir-accent);
    color: var(--pir-accent);
}

/* ─────────────── Card Grid ─────────────── */

.pir-grid {
    display: grid;
    gap: 22px;
}

.pir-grid-3 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.pir-grid-4 { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }

.pir-card {
    background: var(--pir-surface);
    border: 1px solid var(--pir-border);
    transition: transform 0.25s, border-color 0.25s;
    display: flex;
    flex-direction: column;
}

.pir-card:hover {
    transform: translateY(-4px);
    border-color: rgba(255, 122, 26, 0.5);
}

.pir-card-image {
    aspect-ratio: 16 / 10;
    background: #1a1f2a center / cover no-repeat;
    position: relative;
}

.pir-card-image::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(11, 18, 32, 0) 60%, rgba(11, 18, 32, 0.6) 100%);
    pointer-events: none;
}

.pir-card-body { padding: 26px; flex: 1; display: flex; flex-direction: column; }

.pir-card-title {
    font-size: 18px;
    margin: 0 0 8px;
    letter-spacing: 1px;
    text-transform: uppercase;
    font-weight: 700;
}

.pir-card-sub {
    color: var(--pir-text-mute);
    font-size: 13px;
    margin: 0 0 12px;
}

.pir-card-content {
    color: #C7CCD5;
    font-size: 14px;
    margin: 0 0 18px;
    flex: 1;
}

.pir-card-link {
    color: var(--pir-accent);
    font-size: 11px;
    letter-spacing: 2.5px;
    text-decoration: none;
    font-weight: 700;
    align-self: flex-start;
}

.pir-card-link:hover { color: var(--pir-accent-2); }

.pir-card-link span { display: inline-block; margin-left: 6px; transform: translateY(-1px); }

/* ─────────────── Feature Row (Mission Focused) ─────────────── */

.pir-feature-row { background: var(--pir-bg-deep); padding: 60px 0 80px; }

.pir-feature-grid {
    display: grid;
    gap: 32px;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.pir-feature { padding: 0; }

.pir-feature-icon {
    display: inline-block;
    width: 48px;
    height: 48px;
    border: 1px solid rgba(255, 122, 26, 0.55);
    margin-bottom: 22px;
    position: relative;
}

.pir-feature-icon::before,
.pir-feature-icon::after {
    content: "";
    position: absolute;
    background: var(--pir-accent);
}

.pir-feature-icon::before {
    left: 50%;
    top: 10px;
    bottom: 10px;
    width: 1px;
    transform: translateX(-0.5px);
}

.pir-feature-icon::after {
    top: 50%;
    left: 10px;
    right: 10px;
    height: 1px;
    transform: translateY(-0.5px);
}

.pir-feature-title {
    font-size: 13px;
    letter-spacing: 2.5px;
    margin: 0 0 10px;
    text-transform: uppercase;
    font-weight: 700;
}

.pir-feature-text {
    color: var(--pir-text-mute);
    font-size: 13px;
    margin: 0;
    line-height: 1.7;
    max-width: 280px;
}

/* ─────────────── Image Banner ─────────────── */

.pir-image-banner {
    min-height: 56vh;
    display: flex;
    align-items: center;
    background-size: cover;
    background-position: center;
}

.pir-image-banner-content { position: relative; z-index: 2; max-width: 820px; }

.pir-banner-title {
    font-size: 50px;
    line-height: 1.05;
    margin: 0 0 24px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: -0.5px;
}

.pir-banner-lead {
    max-width: 600px;
    font-size: 17px;
    color: #C7CCD5;
    margin: 0 0 32px;
}

@media (max-width: 900px) {
    .pir-banner-title { font-size: 32px; }
}

/* ─────────────── Contact ─────────────── */

.pir-contact-list {
    display: grid;
    gap: 28px;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    max-width: 1000px;
}

.pir-contact-item { padding: 0; }

.pir-contact-label {
    font-size: 11px;
    letter-spacing: 2.5px;
    color: var(--pir-accent);
    font-weight: 700;
    margin-bottom: 8px;
    text-transform: uppercase;
}

.pir-contact-value {
    color: var(--pir-text);
    text-decoration: none;
    font-size: 16px;
    display: inline-block;
}

a.pir-contact-value:hover { color: var(--pir-accent); }

/* ─────────────── Footer ─────────────── */

.pir-footer {
    padding: 36px 0;
    background: var(--pir-bg-deep);
    border-top: 1px solid var(--pir-border);
    color: #7A828F;
    font-size: 13px;
}

/* ─────────────── Section 區隔 ─────────────── */

/* 同色相鄰 section 加上細邊 */
.pir-section + .pir-section.is-dark::before {
    content: "";
    position: absolute;
    top: 0;
    left: 7%;
    right: 7%;
    height: 1px;
    background: var(--pir-border);
}